Jerry Bransford wrote:
>A long talk with a Mobil Oil engineer at a trade show cured a similar
>long-standing fear I had of 5W-30.
>
>>>i'm using mobil 5w-30 synthetic oil .....
>>
>[quoted text clipped - 6 lines]
>> when the motor was cranked. Like you I was using 5w-30 synthetic (Mobile 1).
>> Not any more.
>thank you everyone for the info. the reason i was asking was because i started to use mobil 5w-30 syenthetic three to four oil changes ago and now i hear a clicking sound at start up and then when it warms up it goes away. the weather out here in san diego in the winter about 43 deg and in the summer it gets about 95 deg. my budy told me it would be better to keep it at synthetic and go back to 10w-30. he also told me it would be good to use "lucas" oil engine treatment. i asked him whats the diffrence from royal purple or red line. can someone help i don't want to blow my motor and i would love to get the fuull potentual out of my jeep thanks again

--
Message posted via http://www.carkb.com

 

Hi Mike,
Thinner oil will drain from the mains, while parked. Usually you
hear the telltale low knock noise about two or three times before the
oil separates the metals.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Good question. It also appears to burn up or get used faster. When
> used it physically 'feels' thinner too.
>
> Maybe that is it. My mechanical oil pressure gauge does read lower when
> the oil level get low. Every time. I can look at it and know if I will
> be down a liter. Could be it allows the engine to run hotter??
>
> Don't really know.
>
> Mike

 

Hi Mike,
Thinner oil will drain from the mains, while parked. Usually you
hear the telltale low knock noise about two or three times before the
oil separates the metals.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Good question. It also appears to burn up or get used faster. When
> used it physically 'feels' thinner too.
>
> Maybe that is it. My mechanical oil pressure gauge does read lower when
> the oil level get low. Every time. I can look at it and know if I will
> be down a liter. Could be it allows the engine to run hotter??
>
> Don't really know.
>
> Mike

 

Hi Mike,
Thinner oil will drain from the mains, while parked. Usually you
hear the telltale low knock noise about two or three times before the
oil separates the metals.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Good question. It also appears to burn up or get used faster. When
> used it physically 'feels' thinner too.
>
> Maybe that is it. My mechanical oil pressure gauge does read lower when
> the oil level get low. Every time. I can look at it and know if I will
> be down a liter. Could be it allows the engine to run hotter??
>
> Don't really know.
>
> Mike

 

Please define "Temperate Conditions".

My XJ manual and my WJ manual clearly indicate with a chart to use 5w-30
ONLY when the weather is below freezing (32F) and the "Preferred" weight is
10w-30 for weather at 0F and above.

That being said the OP lives in San Diego. I will quote from the NOAA
http://www.wrh.noaa.gov/sgx/climate/san-san-month.htm

" JANUARY WEATHER IN SAN DIEGO

JANUARY IS USUALLY THE COLDEST MONTH OF THE YEAR IN SAN DIEGO AND THE ONLY
MONTH WHEN TEMPERATURES BELOW THE FREEZING POINT WERE EXPERIENCED AT THE
NATIONAL WEATHER SERVICE. ONLY ON 9 DAYS HAS A READING OF 32 DEGREES OR
BELOW BEEN RECORDED SINCE RECORDS BEGAN IN 1872 WITH THE ABSOLUTE LOW OF 25
DEGREES ON JANUARY 7,
1913. THE AVERAGE MINIMUM TEMPERATURE FOR THE MONTH IS 48.9 DEGREES, THE
AVERAGE MAXIMUM 65.9 DEGREES AND THE MEAN 57.4 DEGREES. DAYTIME READINGS
OFTEN REACH 70 DEGREES AND OCCASIONALLY 80 DEGREES AND ON JANUARY 10 IN 1953
ROSE TO A HIGH OF 88 DEGREES."

In the past 134 years there have been a total of 9 days where the use of
5w-30 would be in the allowed range.

Will lower weight (5w vs. 10w) multi-viscosity oil lead to parts failures?
I don't know and I doubt it would in a properly maintained motor in good
condition but why intentionally use an improper weight oil?

It took me a long time to change from my belief that in regard to motor oil
that thicker was better. I am sure that is based on my age and the vehicles
of that era. I am from the pre-ASE era, my mechanics accreditation was
based on written and practical exam from Chrysler.

The first step for oil burning, consumption, leaking, and low pressure was
to use thicker oil as that usually "cured" the problem. When GM first
started recommending 5w-30 oil in the 80s it took the motoring public and
professionals by surprise as the trend was the other direction. The biggest
seller by far was 10w-40 and the 15w-40 and 20w-50 weights sales were
rising. I personally believed in using straight 30 weight diesel oil
(Pennzoil Series 3) in the summer to clean sludge from internal engine
parts.

This is, however, all historic information jumbled in the dusty corners of
my memory. Newer automobile oils, especially the synthetics, contain
detergents that actually work and offer superior lubrication and protection
for engine parts. In regard to specific applications my concern is that some
oils may be too thick. I used 5w-30 in my twin turbo Audi because 0w-30 was
unavailable locally!

As mentioned above.... why specifically choose to use an oil thinner than
recommended?



"Jerry Bransford" <jerrypb@***.net> wrote in message
news:gBMDf.54991$V.41970@fed1read04...
> Mike, my TJ's owners manual specifically includes 5W-30 as a suitable oil
> for even temperate conditions in addition to the usual 10W-30. :)
>
> Mike Romain wrote:
>> I don't understand why you folks would use an oil that technically could
>> void the engine warranty?
>>
>> If the book calls for 10W30, then using 5W30 is just plain asking for
>> trouble and extra wear due to the thin oil not lubricating or 'staying
>> in' the gaps between friction surfaces.
>>
>> I can see the difference in my mechanical oil pressure gauge when thin
>> oil is used or my oil gets old and thin.
>>
>> I used 5W30 once because I got a 'deal' on it. I very quickly changed
>> it back to the proper oil because the pressure was over 5 psi lower on
>> the highway and especially at idle, it dived really low when hot.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page) Jerry Bransford
>> wrote:
>>
>>>A long talk with a Mobil Oil engineer at a trade show cured a similar
>>>long-standing fear I had of 5W-30.
>>>
>>>Vito wrote:
>>>
>>>>"jeepney driver via CarKB.com" <u17884@uwe> wrote
>>>>
>>>>
>>>>>i'm using mobil 5w-30 synthetic oil .....
>>>>
>>>>
>>>>I'm spookey of 5w-30 in anything but sub-zero weather.
>>>>
>>>>Returning from Long Beach to San Diego one hot afternoon I parked my
>>>>Ford (350C
>>>>motor) for the night. The next AM it turned over a rev then there was a
>>>>loud pop
>>>>and it began running on 6 cylinders. Investigation showed that two
>>>>hydraulic
>>>>lifters had collapsed over night allowing the push rods to come out of
>>>>the cup
>>>>when the motor was cranked. Like you I was using 5w-30 synthetic (Mobile
>>>>1).
>>>>Not any more.
>>>>
>>>>
>>>
>>>--
>>>Jerry Bransford
>>>PP-ASEL N6TAY
>>>See the Geezer Jeep at
>>>http://members.***.net/jerrypb/
>
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.***.net/jerrypb/

 

Please define "Temperate Conditions".

My XJ manual and my WJ manual clearly indicate with a chart to use 5w-30
ONLY when the weather is below freezing (32F) and the "Preferred" weight is
10w-30 for weather at 0F and above.

That being said the OP lives in San Diego. I will quote from the NOAA
http://www.wrh.noaa.gov/sgx/climate/san-san-month.htm

" JANUARY WEATHER IN SAN DIEGO

JANUARY IS USUALLY THE COLDEST MONTH OF THE YEAR IN SAN DIEGO AND THE ONLY
MONTH WHEN TEMPERATURES BELOW THE FREEZING POINT WERE EXPERIENCED AT THE
NATIONAL WEATHER SERVICE. ONLY ON 9 DAYS HAS A READING OF 32 DEGREES OR
BELOW BEEN RECORDED SINCE RECORDS BEGAN IN 1872 WITH THE ABSOLUTE LOW OF 25
DEGREES ON JANUARY 7,
1913. THE AVERAGE MINIMUM TEMPERATURE FOR THE MONTH IS 48.9 DEGREES, THE
AVERAGE MAXIMUM 65.9 DEGREES AND THE MEAN 57.4 DEGREES. DAYTIME READINGS
OFTEN REACH 70 DEGREES AND OCCASIONALLY 80 DEGREES AND ON JANUARY 10 IN 1953
ROSE TO A HIGH OF 88 DEGREES."

In the past 134 years there have been a total of 9 days where the use of
5w-30 would be in the allowed range.

Will lower weight (5w vs. 10w) multi-viscosity oil lead to parts failures?
I don't know and I doubt it would in a properly maintained motor in good
condition but why intentionally use an improper weight oil?

It took me a long time to change from my belief that in regard to motor oil
that thicker was better. I am sure that is based on my age and the vehicles
of that era. I am from the pre-ASE era, my mechanics accreditation was
based on written and practical exam from Chrysler.

The first step for oil burning, consumption, leaking, and low pressure was
to use thicker oil as that usually "cured" the problem. When GM first
started recommending 5w-30 oil in the 80s it took the motoring public and
professionals by surprise as the trend was the other direction. The biggest
seller by far was 10w-40 and the 15w-40 and 20w-50 weights sales were
rising. I personally believed in using straight 30 weight diesel oil
(Pennzoil Series 3) in the summer to clean sludge from internal engine
parts.

This is, however, all historic information jumbled in the dusty corners of
my memory. Newer automobile oils, especially the synthetics, contain
detergents that actually work and offer superior lubrication and protection
for engine parts. In regard to specific applications my concern is that some
oils may be too thick. I used 5w-30 in my twin turbo Audi because 0w-30 was
unavailable locally!

As mentioned above.... why specifically choose to use an oil thinner than
recommended?



"Jerry Bransford" <jerrypb@***.net> wrote in message
news:gBMDf.54991$V.41970@fed1read04...
> Mike, my TJ's owners manual specifically includes 5W-30 as a suitable oil
> for even temperate conditions in addition to the usual 10W-30. :)
>
> Mike Romain wrote:
>> I don't understand why you folks would use an oil that technically could
>> void the engine warranty?
>>
>> If the book calls for 10W30, then using 5W30 is just plain asking for
>> trouble and extra wear due to the thin oil not lubricating or 'staying
>> in' the gaps between friction surfaces.
>>
>> I can see the difference in my mechanical oil pressure gauge when thin
>> oil is used or my oil gets old and thin.
>>
>> I used 5W30 once because I got a 'deal' on it. I very quickly changed
>> it back to the proper oil because the pressure was over 5 psi lower on
>> the highway and especially at idle, it dived really low when hot.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page) Jerry Bransford
>> wrote:
>>
>>>A long talk with a Mobil Oil engineer at a trade show cured a similar
>>>long-standing fear I had of 5W-30.
>>>
>>>Vito wrote:
>>>
>>>>"jeepney driver via CarKB.com" <u17884@uwe> wrote
>>>>
>>>>
>>>>>i'm using mobil 5w-30 synthetic oil .....
>>>>
>>>>
>>>>I'm spookey of 5w-30 in anything but sub-zero weather.
>>>>
>>>>Returning from Long Beach to San Diego one hot afternoon I parked my
>>>>Ford (350C
>>>>motor) for the night. The next AM it turned over a rev then there was a
>>>>loud pop
>>>>and it began running on 6 cylinders. Investigation showed that two
>>>>hydraulic
>>>>lifters had collapsed over night allowing the push rods to come out of
>>>>the cup
>>>>when the motor was cranked. Like you I was using 5w-30 synthetic (Mobile
>>>>1).
>>>>Not any more.
>>>>
>>>>
>>>
>>>--
>>>Jerry Bransford
>>>PP-ASEL N6TAY
>>>See the Geezer Jeep at
>>>http://members.***.net/jerrypb/
>
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.***.net/jerrypb/

 

Please define "Temperate Conditions".

My XJ manual and my WJ manual clearly indicate with a chart to use 5w-30
ONLY when the weather is below freezing (32F) and the "Preferred" weight is
10w-30 for weather at 0F and above.

That being said the OP lives in San Diego. I will quote from the NOAA
http://www.wrh.noaa.gov/sgx/climate/san-san-month.htm

" JANUARY WEATHER IN SAN DIEGO

JANUARY IS USUALLY THE COLDEST MONTH OF THE YEAR IN SAN DIEGO AND THE ONLY
MONTH WHEN TEMPERATURES BELOW THE FREEZING POINT WERE EXPERIENCED AT THE
NATIONAL WEATHER SERVICE. ONLY ON 9 DAYS HAS A READING OF 32 DEGREES OR
BELOW BEEN RECORDED SINCE RECORDS BEGAN IN 1872 WITH THE ABSOLUTE LOW OF 25
DEGREES ON JANUARY 7,
1913. THE AVERAGE MINIMUM TEMPERATURE FOR THE MONTH IS 48.9 DEGREES, THE
AVERAGE MAXIMUM 65.9 DEGREES AND THE MEAN 57.4 DEGREES. DAYTIME READINGS
OFTEN REACH 70 DEGREES AND OCCASIONALLY 80 DEGREES AND ON JANUARY 10 IN 1953
ROSE TO A HIGH OF 88 DEGREES."

In the past 134 years there have been a total of 9 days where the use of
5w-30 would be in the allowed range.

Will lower weight (5w vs. 10w) multi-viscosity oil lead to parts failures?
I don't know and I doubt it would in a properly maintained motor in good
condition but why intentionally use an improper weight oil?

It took me a long time to change from my belief that in regard to motor oil
that thicker was better. I am sure that is based on my age and the vehicles
of that era. I am from the pre-ASE era, my mechanics accreditation was
based on written and practical exam from Chrysler.

The first step for oil burning, consumption, leaking, and low pressure was
to use thicker oil as that usually "cured" the problem. When GM first
started recommending 5w-30 oil in the 80s it took the motoring public and
professionals by surprise as the trend was the other direction. The biggest
seller by far was 10w-40 and the 15w-40 and 20w-50 weights sales were
rising. I personally believed in using straight 30 weight diesel oil
(Pennzoil Series 3) in the summer to clean sludge from internal engine
parts.

This is, however, all historic information jumbled in the dusty corners of
my memory. Newer automobile oils, especially the synthetics, contain
detergents that actually work and offer superior lubrication and protection
for engine parts. In regard to specific applications my concern is that some
oils may be too thick. I used 5w-30 in my twin turbo Audi because 0w-30 was
unavailable locally!

As mentioned above.... why specifically choose to use an oil thinner than
recommended?



"Jerry Bransford" <jerrypb@***.net> wrote in message
news:gBMDf.54991$V.41970@fed1read04...
> Mike, my TJ's owners manual specifically includes 5W-30 as a suitable oil
> for even temperate conditions in addition to the usual 10W-30. :)
>
> Mike Romain wrote:
>> I don't understand why you folks would use an oil that technically could
>> void the engine warranty?
>>
>> If the book calls for 10W30, then using 5W30 is just plain asking for
>> trouble and extra wear due to the thin oil not lubricating or 'staying
>> in' the gaps between friction surfaces.
>>
>> I can see the difference in my mechanical oil pressure gauge when thin
>> oil is used or my oil gets old and thin.
>>
>> I used 5W30 once because I got a 'deal' on it. I very quickly changed
>> it back to the proper oil because the pressure was over 5 psi lower on
>> the highway and especially at idle, it dived really low when hot.
>>
>> Mike
>> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>> 88 Cherokee 235 BFG AT's
>> Canadian Off Road Trips Photos: Non members can still view!
>> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
>> (More Off Road album links at bottom of the view page) Jerry Bransford
>> wrote:
>>
>>>A long talk with a Mobil Oil engineer at a trade show cured a similar
>>>long-standing fear I had of 5W-30.
>>>
>>>Vito wrote:
>>>
>>>>"jeepney driver via CarKB.com" <u17884@uwe> wrote
>>>>
>>>>
>>>>>i'm using mobil 5w-30 synthetic oil .....
>>>>
>>>>
>>>>I'm spookey of 5w-30 in anything but sub-zero weather.
>>>>
>>>>Returning from Long Beach to San Diego one hot afternoon I parked my
>>>>Ford (350C
>>>>motor) for the night. The next AM it turned over a rev then there was a
>>>>loud pop
>>>>and it began running on 6 cylinders. Investigation showed that two
>>>>hydraulic
>>>>lifters had collapsed over night allowing the push rods to come out of
>>>>the cup
>>>>when the motor was cranked. Like you I was using 5w-30 synthetic (Mobile
>>>>1).
>>>>Not any more.
>>>>
>>>>
>>>
>>>--
>>>Jerry Bransford
>>>PP-ASEL N6TAY
>>>See the Geezer Jeep at
>>>http://members.***.net/jerrypb/
>
> --
> Jerry Bransford
> PP-ASEL N6TAY
> See the Geezer Jeep at
> http://members.***.net/jerrypb/

 

http://www.wkjeeps.com/wk_maintenance.htm#ENGOIL
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> I don't understand why you folks would use an oil that technically could
> void the engine warranty?
>
> If the book calls for 10W30, then using 5W30 is just plain asking for
> trouble and extra wear due to the thin oil not lubricating or 'staying
> in' the gaps between friction surfaces.
>
> I can see the difference in my mechanical oil pressure gauge when thin
> oil is used or my oil gets old and thin.
>
> I used 5W30 once because I got a 'deal' on it. I very quickly changed
> it back to the proper oil because the pressure was over 5 psi lower on
> the highway and especially at idle, it dived really low when hot.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)

 

http://www.wkjeeps.com/wk_maintenance.htm#ENGOIL
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> I don't understand why you folks would use an oil that technically could
> void the engine warranty?
>
> If the book calls for 10W30, then using 5W30 is just plain asking for
> trouble and extra wear due to the thin oil not lubricating or 'staying
> in' the gaps between friction surfaces.
>
> I can see the difference in my mechanical oil pressure gauge when thin
> oil is used or my oil gets old and thin.
>
> I used 5W30 once because I got a 'deal' on it. I very quickly changed
> it back to the proper oil because the pressure was over 5 psi lower on
> the highway and especially at idle, it dived really low when hot.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)

 

http://www.wkjeeps.com/wk_maintenance.htm#ENGOIL
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> I don't understand why you folks would use an oil that technically could
> void the engine warranty?
>
> If the book calls for 10W30, then using 5W30 is just plain asking for
> trouble and extra wear due to the thin oil not lubricating or 'staying
> in' the gaps between friction surfaces.
>
> I can see the difference in my mechanical oil pressure gauge when thin
> oil is used or my oil gets old and thin.
>
> I used 5W30 once because I got a 'deal' on it. I very quickly changed
> it back to the proper oil because the pressure was over 5 psi lower on
> the highway and especially at idle, it dived really low when hot.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)