97 4cyc oil pressure!!
#31
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
I used 20w-50 for a number of years in the wintertime (in Ohio) and straight
30 weight Zoildeeze (spellin'?) or Series 3 in the summer because of it high
detergent package. In later years I used Rotella T 15w-40 year round for
the same reason.
I now use synthetic or synthetic blend oil.
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:42D43A9A.53059F6B@***.net...
> That's what I use, 20/50 Pennz. I do think while you are under
> warranty we should use whatever the owner's manual recommends. My Bronco
> with over tree hundred and fifty thousand miles and the heads have never
> been off, idles hot at fifty pounds: http://www.----------.com/smog.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> BillyRay wrote:
>>
>> I would not think using 20w-50 in an engine designed for 10w-30 that has
>> 110,000 miles would put undue strain on the oil pump. Thicker oil would
>> "make up" for some of the excess gap in a worn out oil pump.
>>
>> Nor do I regard 10w-40 and 20w-50 as "heavy" oils. Until relatively
>> recently 10w-40 was considered a "standard" weight oil. Heavy weight
>> oils
>> such as "straight" 40, 50, and 70 weight were used in high pressure, high
>> power, high altitude, and super-charged engines.
>>
>> Frequent oil and filter changes are important as well as the type of oil
>> itself. I use synthetic or synthetic blend oil which can have the effect
>> of
>> "lowering" oil pressure (a measurement of resistance to flow) because of
>> its
>> naturally superior fluidity (the inverse of viscosity)
>>
>> "Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
>> news:7NWdnUsgubLemEnfRVn-jA@comcast.com...
>> > You can but you will cause further wear of the oil pump or failure all
>> > together. Dodge Rams had issues with oil pumps failing a an extreme
>> > high
>> > rate and after all said and done it was discovered that the owners were
>> > using 20w50 oil on 99% of the failures. Thicker is not better, nor
>> > does
>> > it protect better than a thinner oil. 5w30 and 10w30 oils provide
>> > better
>> > viscosity and more wear protection in vehicles that specify them.
>> > Heavy
>> > oils such as 10w40 or 20w50 in vehicles that do not specify the heavy
>> > weight oil will cause damage to the oil pump. As Mike said just change
>> > your oil.
>> >
>> > --
>> > Coasty
>> > SEMPAR PARATUS
>> > (ALWAYS READY)
>> >
>> > Remove The SPOOGE To Reply
>> > "BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
>> > news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
>> >> You can also use heavier weight oil to prop up the pressure readings.
>> >>
>> >>
>> >> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> >> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>> >>>I would just keep fresh oil and filters in it and realize it is
>> >>>showing
>> >>> it's age. The only real fix is a rebuild.
>> >>>
>> >>> Fresh oil does wonders top keeping the pressure up, when mine starts
>> >>> to
>> >>> drop when hot, I know it is time for a change.
>> >>>
>> >>> Mike
>> >>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> >>> 88 Cherokee 235 BFG AT's
>> >>>
>> >>> Cal wrote:
>> >>>>
>> >>>> Hi!
>> >>>>
>> >>>> I've read many posts here about the lousy oil sending units in these
>> >>>> jeeps.
>> >>>> Well, dropping off to zero is really scary, so I decided to attach a
>> >>>> mechanical oil pressure gauge to determine what is really going on
>> >>>> with
>> >>>> this
>> >>>> pressure. When cold, this engine has around 30-40 lbs pressure at
>> >>>> idle, but
>> >>>> when hot, it normally hovers around 30 at highway speeds, and will
>> >>>> drop
>> >>>> to
>> >>>> zero most often at idle. The mechanical gauge never shows it
>> >>>> dropping
>> >>>> to
>> >>>> zero, but to 9 or 10 lbs at idle. The owners manual states that
>> >>>> 13lbs
>> >>>> at
>> >>>> idle is acceptable.
>> >>>> I know the possible causes are oil pump, air leak at pick-up tube,
>> >>>> perhaps
>> >>>> dirty screen, and bearings. This engine has 110,000 miles on it,
>> >>>> with
>> >>>> no
>> >>>> unusual engine noises that would maybe indicate bearings. It really
>> >>>> doesn't
>> >>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear
>> >>>> what
>> >>>> sounds kinda like a valve lifter, or maybe just common cylinder
>> >>>> noise.
>> >>>> Any
>> >>>> ideas??
>> >>>>
>> >>>> cal
>> >>
>> >>
>> >
>> >
30 weight Zoildeeze (spellin'?) or Series 3 in the summer because of it high
detergent package. In later years I used Rotella T 15w-40 year round for
the same reason.
I now use synthetic or synthetic blend oil.
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:42D43A9A.53059F6B@***.net...
> That's what I use, 20/50 Pennz. I do think while you are under
> warranty we should use whatever the owner's manual recommends. My Bronco
> with over tree hundred and fifty thousand miles and the heads have never
> been off, idles hot at fifty pounds: http://www.----------.com/smog.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> BillyRay wrote:
>>
>> I would not think using 20w-50 in an engine designed for 10w-30 that has
>> 110,000 miles would put undue strain on the oil pump. Thicker oil would
>> "make up" for some of the excess gap in a worn out oil pump.
>>
>> Nor do I regard 10w-40 and 20w-50 as "heavy" oils. Until relatively
>> recently 10w-40 was considered a "standard" weight oil. Heavy weight
>> oils
>> such as "straight" 40, 50, and 70 weight were used in high pressure, high
>> power, high altitude, and super-charged engines.
>>
>> Frequent oil and filter changes are important as well as the type of oil
>> itself. I use synthetic or synthetic blend oil which can have the effect
>> of
>> "lowering" oil pressure (a measurement of resistance to flow) because of
>> its
>> naturally superior fluidity (the inverse of viscosity)
>>
>> "Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
>> news:7NWdnUsgubLemEnfRVn-jA@comcast.com...
>> > You can but you will cause further wear of the oil pump or failure all
>> > together. Dodge Rams had issues with oil pumps failing a an extreme
>> > high
>> > rate and after all said and done it was discovered that the owners were
>> > using 20w50 oil on 99% of the failures. Thicker is not better, nor
>> > does
>> > it protect better than a thinner oil. 5w30 and 10w30 oils provide
>> > better
>> > viscosity and more wear protection in vehicles that specify them.
>> > Heavy
>> > oils such as 10w40 or 20w50 in vehicles that do not specify the heavy
>> > weight oil will cause damage to the oil pump. As Mike said just change
>> > your oil.
>> >
>> > --
>> > Coasty
>> > SEMPAR PARATUS
>> > (ALWAYS READY)
>> >
>> > Remove The SPOOGE To Reply
>> > "BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
>> > news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
>> >> You can also use heavier weight oil to prop up the pressure readings.
>> >>
>> >>
>> >> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> >> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>> >>>I would just keep fresh oil and filters in it and realize it is
>> >>>showing
>> >>> it's age. The only real fix is a rebuild.
>> >>>
>> >>> Fresh oil does wonders top keeping the pressure up, when mine starts
>> >>> to
>> >>> drop when hot, I know it is time for a change.
>> >>>
>> >>> Mike
>> >>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> >>> 88 Cherokee 235 BFG AT's
>> >>>
>> >>> Cal wrote:
>> >>>>
>> >>>> Hi!
>> >>>>
>> >>>> I've read many posts here about the lousy oil sending units in these
>> >>>> jeeps.
>> >>>> Well, dropping off to zero is really scary, so I decided to attach a
>> >>>> mechanical oil pressure gauge to determine what is really going on
>> >>>> with
>> >>>> this
>> >>>> pressure. When cold, this engine has around 30-40 lbs pressure at
>> >>>> idle, but
>> >>>> when hot, it normally hovers around 30 at highway speeds, and will
>> >>>> drop
>> >>>> to
>> >>>> zero most often at idle. The mechanical gauge never shows it
>> >>>> dropping
>> >>>> to
>> >>>> zero, but to 9 or 10 lbs at idle. The owners manual states that
>> >>>> 13lbs
>> >>>> at
>> >>>> idle is acceptable.
>> >>>> I know the possible causes are oil pump, air leak at pick-up tube,
>> >>>> perhaps
>> >>>> dirty screen, and bearings. This engine has 110,000 miles on it,
>> >>>> with
>> >>>> no
>> >>>> unusual engine noises that would maybe indicate bearings. It really
>> >>>> doesn't
>> >>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear
>> >>>> what
>> >>>> sounds kinda like a valve lifter, or maybe just common cylinder
>> >>>> noise.
>> >>>> Any
>> >>>> ideas??
>> >>>>
>> >>>> cal
>> >>
>> >>
>> >
>> >
#32
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
I used 20w-50 for a number of years in the wintertime (in Ohio) and straight
30 weight Zoildeeze (spellin'?) or Series 3 in the summer because of it high
detergent package. In later years I used Rotella T 15w-40 year round for
the same reason.
I now use synthetic or synthetic blend oil.
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:42D43A9A.53059F6B@***.net...
> That's what I use, 20/50 Pennz. I do think while you are under
> warranty we should use whatever the owner's manual recommends. My Bronco
> with over tree hundred and fifty thousand miles and the heads have never
> been off, idles hot at fifty pounds: http://www.----------.com/smog.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> BillyRay wrote:
>>
>> I would not think using 20w-50 in an engine designed for 10w-30 that has
>> 110,000 miles would put undue strain on the oil pump. Thicker oil would
>> "make up" for some of the excess gap in a worn out oil pump.
>>
>> Nor do I regard 10w-40 and 20w-50 as "heavy" oils. Until relatively
>> recently 10w-40 was considered a "standard" weight oil. Heavy weight
>> oils
>> such as "straight" 40, 50, and 70 weight were used in high pressure, high
>> power, high altitude, and super-charged engines.
>>
>> Frequent oil and filter changes are important as well as the type of oil
>> itself. I use synthetic or synthetic blend oil which can have the effect
>> of
>> "lowering" oil pressure (a measurement of resistance to flow) because of
>> its
>> naturally superior fluidity (the inverse of viscosity)
>>
>> "Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
>> news:7NWdnUsgubLemEnfRVn-jA@comcast.com...
>> > You can but you will cause further wear of the oil pump or failure all
>> > together. Dodge Rams had issues with oil pumps failing a an extreme
>> > high
>> > rate and after all said and done it was discovered that the owners were
>> > using 20w50 oil on 99% of the failures. Thicker is not better, nor
>> > does
>> > it protect better than a thinner oil. 5w30 and 10w30 oils provide
>> > better
>> > viscosity and more wear protection in vehicles that specify them.
>> > Heavy
>> > oils such as 10w40 or 20w50 in vehicles that do not specify the heavy
>> > weight oil will cause damage to the oil pump. As Mike said just change
>> > your oil.
>> >
>> > --
>> > Coasty
>> > SEMPAR PARATUS
>> > (ALWAYS READY)
>> >
>> > Remove The SPOOGE To Reply
>> > "BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
>> > news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
>> >> You can also use heavier weight oil to prop up the pressure readings.
>> >>
>> >>
>> >> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> >> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>> >>>I would just keep fresh oil and filters in it and realize it is
>> >>>showing
>> >>> it's age. The only real fix is a rebuild.
>> >>>
>> >>> Fresh oil does wonders top keeping the pressure up, when mine starts
>> >>> to
>> >>> drop when hot, I know it is time for a change.
>> >>>
>> >>> Mike
>> >>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> >>> 88 Cherokee 235 BFG AT's
>> >>>
>> >>> Cal wrote:
>> >>>>
>> >>>> Hi!
>> >>>>
>> >>>> I've read many posts here about the lousy oil sending units in these
>> >>>> jeeps.
>> >>>> Well, dropping off to zero is really scary, so I decided to attach a
>> >>>> mechanical oil pressure gauge to determine what is really going on
>> >>>> with
>> >>>> this
>> >>>> pressure. When cold, this engine has around 30-40 lbs pressure at
>> >>>> idle, but
>> >>>> when hot, it normally hovers around 30 at highway speeds, and will
>> >>>> drop
>> >>>> to
>> >>>> zero most often at idle. The mechanical gauge never shows it
>> >>>> dropping
>> >>>> to
>> >>>> zero, but to 9 or 10 lbs at idle. The owners manual states that
>> >>>> 13lbs
>> >>>> at
>> >>>> idle is acceptable.
>> >>>> I know the possible causes are oil pump, air leak at pick-up tube,
>> >>>> perhaps
>> >>>> dirty screen, and bearings. This engine has 110,000 miles on it,
>> >>>> with
>> >>>> no
>> >>>> unusual engine noises that would maybe indicate bearings. It really
>> >>>> doesn't
>> >>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear
>> >>>> what
>> >>>> sounds kinda like a valve lifter, or maybe just common cylinder
>> >>>> noise.
>> >>>> Any
>> >>>> ideas??
>> >>>>
>> >>>> cal
>> >>
>> >>
>> >
>> >
30 weight Zoildeeze (spellin'?) or Series 3 in the summer because of it high
detergent package. In later years I used Rotella T 15w-40 year round for
the same reason.
I now use synthetic or synthetic blend oil.
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:42D43A9A.53059F6B@***.net...
> That's what I use, 20/50 Pennz. I do think while you are under
> warranty we should use whatever the owner's manual recommends. My Bronco
> with over tree hundred and fifty thousand miles and the heads have never
> been off, idles hot at fifty pounds: http://www.----------.com/smog.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> BillyRay wrote:
>>
>> I would not think using 20w-50 in an engine designed for 10w-30 that has
>> 110,000 miles would put undue strain on the oil pump. Thicker oil would
>> "make up" for some of the excess gap in a worn out oil pump.
>>
>> Nor do I regard 10w-40 and 20w-50 as "heavy" oils. Until relatively
>> recently 10w-40 was considered a "standard" weight oil. Heavy weight
>> oils
>> such as "straight" 40, 50, and 70 weight were used in high pressure, high
>> power, high altitude, and super-charged engines.
>>
>> Frequent oil and filter changes are important as well as the type of oil
>> itself. I use synthetic or synthetic blend oil which can have the effect
>> of
>> "lowering" oil pressure (a measurement of resistance to flow) because of
>> its
>> naturally superior fluidity (the inverse of viscosity)
>>
>> "Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
>> news:7NWdnUsgubLemEnfRVn-jA@comcast.com...
>> > You can but you will cause further wear of the oil pump or failure all
>> > together. Dodge Rams had issues with oil pumps failing a an extreme
>> > high
>> > rate and after all said and done it was discovered that the owners were
>> > using 20w50 oil on 99% of the failures. Thicker is not better, nor
>> > does
>> > it protect better than a thinner oil. 5w30 and 10w30 oils provide
>> > better
>> > viscosity and more wear protection in vehicles that specify them.
>> > Heavy
>> > oils such as 10w40 or 20w50 in vehicles that do not specify the heavy
>> > weight oil will cause damage to the oil pump. As Mike said just change
>> > your oil.
>> >
>> > --
>> > Coasty
>> > SEMPAR PARATUS
>> > (ALWAYS READY)
>> >
>> > Remove The SPOOGE To Reply
>> > "BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
>> > news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
>> >> You can also use heavier weight oil to prop up the pressure readings.
>> >>
>> >>
>> >> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> >> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>> >>>I would just keep fresh oil and filters in it and realize it is
>> >>>showing
>> >>> it's age. The only real fix is a rebuild.
>> >>>
>> >>> Fresh oil does wonders top keeping the pressure up, when mine starts
>> >>> to
>> >>> drop when hot, I know it is time for a change.
>> >>>
>> >>> Mike
>> >>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> >>> 88 Cherokee 235 BFG AT's
>> >>>
>> >>> Cal wrote:
>> >>>>
>> >>>> Hi!
>> >>>>
>> >>>> I've read many posts here about the lousy oil sending units in these
>> >>>> jeeps.
>> >>>> Well, dropping off to zero is really scary, so I decided to attach a
>> >>>> mechanical oil pressure gauge to determine what is really going on
>> >>>> with
>> >>>> this
>> >>>> pressure. When cold, this engine has around 30-40 lbs pressure at
>> >>>> idle, but
>> >>>> when hot, it normally hovers around 30 at highway speeds, and will
>> >>>> drop
>> >>>> to
>> >>>> zero most often at idle. The mechanical gauge never shows it
>> >>>> dropping
>> >>>> to
>> >>>> zero, but to 9 or 10 lbs at idle. The owners manual states that
>> >>>> 13lbs
>> >>>> at
>> >>>> idle is acceptable.
>> >>>> I know the possible causes are oil pump, air leak at pick-up tube,
>> >>>> perhaps
>> >>>> dirty screen, and bearings. This engine has 110,000 miles on it,
>> >>>> with
>> >>>> no
>> >>>> unusual engine noises that would maybe indicate bearings. It really
>> >>>> doesn't
>> >>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear
>> >>>> what
>> >>>> sounds kinda like a valve lifter, or maybe just common cylinder
>> >>>> noise.
>> >>>> Any
>> >>>> ideas??
>> >>>>
>> >>>> cal
>> >>
>> >>
>> >
>> >
#33
Guest
Posts: n/a
Re: 97 4cyc oil pressure!!
I used 20w-50 for a number of years in the wintertime (in Ohio) and straight
30 weight Zoildeeze (spellin'?) or Series 3 in the summer because of it high
detergent package. In later years I used Rotella T 15w-40 year round for
the same reason.
I now use synthetic or synthetic blend oil.
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:42D43A9A.53059F6B@***.net...
> That's what I use, 20/50 Pennz. I do think while you are under
> warranty we should use whatever the owner's manual recommends. My Bronco
> with over tree hundred and fifty thousand miles and the heads have never
> been off, idles hot at fifty pounds: http://www.----------.com/smog.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> BillyRay wrote:
>>
>> I would not think using 20w-50 in an engine designed for 10w-30 that has
>> 110,000 miles would put undue strain on the oil pump. Thicker oil would
>> "make up" for some of the excess gap in a worn out oil pump.
>>
>> Nor do I regard 10w-40 and 20w-50 as "heavy" oils. Until relatively
>> recently 10w-40 was considered a "standard" weight oil. Heavy weight
>> oils
>> such as "straight" 40, 50, and 70 weight were used in high pressure, high
>> power, high altitude, and super-charged engines.
>>
>> Frequent oil and filter changes are important as well as the type of oil
>> itself. I use synthetic or synthetic blend oil which can have the effect
>> of
>> "lowering" oil pressure (a measurement of resistance to flow) because of
>> its
>> naturally superior fluidity (the inverse of viscosity)
>>
>> "Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
>> news:7NWdnUsgubLemEnfRVn-jA@comcast.com...
>> > You can but you will cause further wear of the oil pump or failure all
>> > together. Dodge Rams had issues with oil pumps failing a an extreme
>> > high
>> > rate and after all said and done it was discovered that the owners were
>> > using 20w50 oil on 99% of the failures. Thicker is not better, nor
>> > does
>> > it protect better than a thinner oil. 5w30 and 10w30 oils provide
>> > better
>> > viscosity and more wear protection in vehicles that specify them.
>> > Heavy
>> > oils such as 10w40 or 20w50 in vehicles that do not specify the heavy
>> > weight oil will cause damage to the oil pump. As Mike said just change
>> > your oil.
>> >
>> > --
>> > Coasty
>> > SEMPAR PARATUS
>> > (ALWAYS READY)
>> >
>> > Remove The SPOOGE To Reply
>> > "BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
>> > news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
>> >> You can also use heavier weight oil to prop up the pressure readings.
>> >>
>> >>
>> >> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> >> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>> >>>I would just keep fresh oil and filters in it and realize it is
>> >>>showing
>> >>> it's age. The only real fix is a rebuild.
>> >>>
>> >>> Fresh oil does wonders top keeping the pressure up, when mine starts
>> >>> to
>> >>> drop when hot, I know it is time for a change.
>> >>>
>> >>> Mike
>> >>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> >>> 88 Cherokee 235 BFG AT's
>> >>>
>> >>> Cal wrote:
>> >>>>
>> >>>> Hi!
>> >>>>
>> >>>> I've read many posts here about the lousy oil sending units in these
>> >>>> jeeps.
>> >>>> Well, dropping off to zero is really scary, so I decided to attach a
>> >>>> mechanical oil pressure gauge to determine what is really going on
>> >>>> with
>> >>>> this
>> >>>> pressure. When cold, this engine has around 30-40 lbs pressure at
>> >>>> idle, but
>> >>>> when hot, it normally hovers around 30 at highway speeds, and will
>> >>>> drop
>> >>>> to
>> >>>> zero most often at idle. The mechanical gauge never shows it
>> >>>> dropping
>> >>>> to
>> >>>> zero, but to 9 or 10 lbs at idle. The owners manual states that
>> >>>> 13lbs
>> >>>> at
>> >>>> idle is acceptable.
>> >>>> I know the possible causes are oil pump, air leak at pick-up tube,
>> >>>> perhaps
>> >>>> dirty screen, and bearings. This engine has 110,000 miles on it,
>> >>>> with
>> >>>> no
>> >>>> unusual engine noises that would maybe indicate bearings. It really
>> >>>> doesn't
>> >>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear
>> >>>> what
>> >>>> sounds kinda like a valve lifter, or maybe just common cylinder
>> >>>> noise.
>> >>>> Any
>> >>>> ideas??
>> >>>>
>> >>>> cal
>> >>
>> >>
>> >
>> >
30 weight Zoildeeze (spellin'?) or Series 3 in the summer because of it high
detergent package. In later years I used Rotella T 15w-40 year round for
the same reason.
I now use synthetic or synthetic blend oil.
"L.W. ("ßill") ------ III" <----------@***.net> wrote in message
news:42D43A9A.53059F6B@***.net...
> That's what I use, 20/50 Pennz. I do think while you are under
> warranty we should use whatever the owner's manual recommends. My Bronco
> with over tree hundred and fifty thousand miles and the heads have never
> been off, idles hot at fifty pounds: http://www.----------.com/smog.jpg
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> BillyRay wrote:
>>
>> I would not think using 20w-50 in an engine designed for 10w-30 that has
>> 110,000 miles would put undue strain on the oil pump. Thicker oil would
>> "make up" for some of the excess gap in a worn out oil pump.
>>
>> Nor do I regard 10w-40 and 20w-50 as "heavy" oils. Until relatively
>> recently 10w-40 was considered a "standard" weight oil. Heavy weight
>> oils
>> such as "straight" 40, 50, and 70 weight were used in high pressure, high
>> power, high altitude, and super-charged engines.
>>
>> Frequent oil and filter changes are important as well as the type of oil
>> itself. I use synthetic or synthetic blend oil which can have the effect
>> of
>> "lowering" oil pressure (a measurement of resistance to flow) because of
>> its
>> naturally superior fluidity (the inverse of viscosity)
>>
>> "Coasty" <uscg_retSPOOGE@comcast.net> wrote in message
>> news:7NWdnUsgubLemEnfRVn-jA@comcast.com...
>> > You can but you will cause further wear of the oil pump or failure all
>> > together. Dodge Rams had issues with oil pumps failing a an extreme
>> > high
>> > rate and after all said and done it was discovered that the owners were
>> > using 20w50 oil on 99% of the failures. Thicker is not better, nor
>> > does
>> > it protect better than a thinner oil. 5w30 and 10w30 oils provide
>> > better
>> > viscosity and more wear protection in vehicles that specify them.
>> > Heavy
>> > oils such as 10w40 or 20w50 in vehicles that do not specify the heavy
>> > weight oil will cause damage to the oil pump. As Mike said just change
>> > your oil.
>> >
>> > --
>> > Coasty
>> > SEMPAR PARATUS
>> > (ALWAYS READY)
>> >
>> > Remove The SPOOGE To Reply
>> > "BillyRay" <jpbSPAM357@junoSPAM.com> wrote in message
>> > news:80b8a$42d3fec0$4831337f$5051@FUSE.NET...
>> >> You can also use heavier weight oil to prop up the pressure readings.
>> >>
>> >>
>> >> "Mike Romain" <romainm@sympatico.ca> wrote in message
>> >> news:42D3F8E8.AC8BA3E3@sympatico.ca...
>> >>>I would just keep fresh oil and filters in it and realize it is
>> >>>showing
>> >>> it's age. The only real fix is a rebuild.
>> >>>
>> >>> Fresh oil does wonders top keeping the pressure up, when mine starts
>> >>> to
>> >>> drop when hot, I know it is time for a change.
>> >>>
>> >>> Mike
>> >>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> >>> 88 Cherokee 235 BFG AT's
>> >>>
>> >>> Cal wrote:
>> >>>>
>> >>>> Hi!
>> >>>>
>> >>>> I've read many posts here about the lousy oil sending units in these
>> >>>> jeeps.
>> >>>> Well, dropping off to zero is really scary, so I decided to attach a
>> >>>> mechanical oil pressure gauge to determine what is really going on
>> >>>> with
>> >>>> this
>> >>>> pressure. When cold, this engine has around 30-40 lbs pressure at
>> >>>> idle, but
>> >>>> when hot, it normally hovers around 30 at highway speeds, and will
>> >>>> drop
>> >>>> to
>> >>>> zero most often at idle. The mechanical gauge never shows it
>> >>>> dropping
>> >>>> to
>> >>>> zero, but to 9 or 10 lbs at idle. The owners manual states that
>> >>>> 13lbs
>> >>>> at
>> >>>> idle is acceptable.
>> >>>> I know the possible causes are oil pump, air leak at pick-up tube,
>> >>>> perhaps
>> >>>> dirty screen, and bearings. This engine has 110,000 miles on it,
>> >>>> with
>> >>>> no
>> >>>> unusual engine noises that would maybe indicate bearings. It really
>> >>>> doesn't
>> >>>> sound any different than it did 3 or 4 years ago.. Sometimes I hear
>> >>>> what
>> >>>> sounds kinda like a valve lifter, or maybe just common cylinder
>> >>>> noise.
>> >>>> Any
>> >>>> ideas??
>> >>>>
>> >>>> cal
>> >>
>> >>
>> >
>> >
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mmiller
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12-11-2008 11:40 PM
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