Usually when an old engine starts to run too quiet, it is on it's last
legs and about to blow up. I start shopping about then.....

I 'certainly' wouldn't buy one like that, especially if it's being
abused like you mention by the person thinking he doesn't need to change
his oil now.....

Any fool that boasts about engine abuse thinking it is a good thing,
well....

You have 150K on it. If you do switch, let us know the results please.
Any old engines I have seen that got switched turned into pincushions
and leaked oil everywhere.

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)

Cal wrote:
>
> How does the group feel about changing oil brands? I have a 97 GC, 150,000
> miles. I have used havoline 10/30 every 3000 to 4000 miles since i have had
> this jeep. I have a friend that changed from havoline 10/30 to valvoline
> 10/30 full synthetic, and his 4 cylinder sounds like a different engine. I
> runs much quieter, even after 6000 miles on the oil. He has a '97 with
> 120,000 miles on it. "In the day", there was much said about possible
> problems changing brands, different detergents may loosen sludge in the
> engine, and changing brands was not advised. The difference in the sound of
> his engine with the valvoline tells me he is getting better lubrication.
> How does the group feel about changing brands? I have no rea reason to
> change, no problems with mine. But if valvoline lubricates better...
>
> cal

 

Usually when an old engine starts to run too quiet, it is on it's last
legs and about to blow up. I start shopping about then.....

I 'certainly' wouldn't buy one like that, especially if it's being
abused like you mention by the person thinking he doesn't need to change
his oil now.....

Any fool that boasts about engine abuse thinking it is a good thing,
well....

You have 150K on it. If you do switch, let us know the results please.
Any old engines I have seen that got switched turned into pincushions
and leaked oil everywhere.

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)

Cal wrote:
>
> How does the group feel about changing oil brands? I have a 97 GC, 150,000
> miles. I have used havoline 10/30 every 3000 to 4000 miles since i have had
> this jeep. I have a friend that changed from havoline 10/30 to valvoline
> 10/30 full synthetic, and his 4 cylinder sounds like a different engine. I
> runs much quieter, even after 6000 miles on the oil. He has a '97 with
> 120,000 miles on it. "In the day", there was much said about possible
> problems changing brands, different detergents may loosen sludge in the
> engine, and changing brands was not advised. The difference in the sound of
> his engine with the valvoline tells me he is getting better lubrication.
> How does the group feel about changing brands? I have no rea reason to
> change, no problems with mine. But if valvoline lubricates better...
>
> cal

 

I, like most in this group, don't have any problem switching between most
oil brands. The biggest thing is to do regular oil changes every 3000 to
3500 miles. I am a firm believer in synthetic oil. I've changed it in a
company car after 7000 miles and it feels slicker on my fingers than petro
oil does after 3000. I would advise you to stay away from synthetic blends
if you are going to push the miles between oil changes. I have yet to see a
blend tout it's % of synthetic. If you put a teaspoon of synthetic in a
gallon of oil,... you have a blend. A damn useless one, but a blend! I make
my own blend of 3 qts Valvoline (or Havoline or Castrol or Exxon....etc)
10/40 and 3 qts of Mobil 1 10/30. Years ago when I started in the auto parts
business the prevalent opinion was that Quaker State and Pennzoil, which
are/were Pennsylvania Crude refinements, had higher contents of parrafin wax
and tended to sludge up an engine. I have not used either one in over twenty
years and doubt that either uses exclusively Pennsylvania Crude these days.
My 2 cents worth.

Charles Ervin
81 DJ5L 140,000 miles
84 CJ7 100,000 miles
92 YJ 225,000 miles


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:450EB4A0.494225B6@sympatico.ca...
> Usually when an old engine starts to run too quiet, it is on it's last
> legs and about to blow up. I start shopping about then.....
>
> I 'certainly' wouldn't buy one like that, especially if it's being
> abused like you mention by the person thinking he doesn't need to change
> his oil now.....
>
> Any fool that boasts about engine abuse thinking it is a good thing,
> well....
>
> You have 150K on it. If you do switch, let us know the results please.
> Any old engines I have seen that got switched turned into pincushions
> and leaked oil everywhere.
>
> 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)
>
> Cal wrote:
>>
>> How does the group feel about changing oil brands? I have a 97 GC,
>> 150,000
>> miles. I have used havoline 10/30 every 3000 to 4000 miles since i have
>> had
>> this jeep. I have a friend that changed from havoline 10/30 to valvoline
>> 10/30 full synthetic, and his 4 cylinder sounds like a different engine.
>> I
>> runs much quieter, even after 6000 miles on the oil. He has a '97 with
>> 120,000 miles on it. "In the day", there was much said about possible
>> problems changing brands, different detergents may loosen sludge in the
>> engine, and changing brands was not advised. The difference in the sound
>> of
>> his engine with the valvoline tells me he is getting better lubrication.
>> How does the group feel about changing brands? I have no rea reason to
>> change, no problems with mine. But if valvoline lubricates better...
>>
>> cal

 

I, like most in this group, don't have any problem switching between most
oil brands. The biggest thing is to do regular oil changes every 3000 to
3500 miles. I am a firm believer in synthetic oil. I've changed it in a
company car after 7000 miles and it feels slicker on my fingers than petro
oil does after 3000. I would advise you to stay away from synthetic blends
if you are going to push the miles between oil changes. I have yet to see a
blend tout it's % of synthetic. If you put a teaspoon of synthetic in a
gallon of oil,... you have a blend. A damn useless one, but a blend! I make
my own blend of 3 qts Valvoline (or Havoline or Castrol or Exxon....etc)
10/40 and 3 qts of Mobil 1 10/30. Years ago when I started in the auto parts
business the prevalent opinion was that Quaker State and Pennzoil, which
are/were Pennsylvania Crude refinements, had higher contents of parrafin wax
and tended to sludge up an engine. I have not used either one in over twenty
years and doubt that either uses exclusively Pennsylvania Crude these days.
My 2 cents worth.

Charles Ervin
81 DJ5L 140,000 miles
84 CJ7 100,000 miles
92 YJ 225,000 miles


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:450EB4A0.494225B6@sympatico.ca...
> Usually when an old engine starts to run too quiet, it is on it's last
> legs and about to blow up. I start shopping about then.....
>
> I 'certainly' wouldn't buy one like that, especially if it's being
> abused like you mention by the person thinking he doesn't need to change
> his oil now.....
>
> Any fool that boasts about engine abuse thinking it is a good thing,
> well....
>
> You have 150K on it. If you do switch, let us know the results please.
> Any old engines I have seen that got switched turned into pincushions
> and leaked oil everywhere.
>
> 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)
>
> Cal wrote:
>>
>> How does the group feel about changing oil brands? I have a 97 GC,
>> 150,000
>> miles. I have used havoline 10/30 every 3000 to 4000 miles since i have
>> had
>> this jeep. I have a friend that changed from havoline 10/30 to valvoline
>> 10/30 full synthetic, and his 4 cylinder sounds like a different engine.
>> I
>> runs much quieter, even after 6000 miles on the oil. He has a '97 with
>> 120,000 miles on it. "In the day", there was much said about possible
>> problems changing brands, different detergents may loosen sludge in the
>> engine, and changing brands was not advised. The difference in the sound
>> of
>> his engine with the valvoline tells me he is getting better lubrication.
>> How does the group feel about changing brands? I have no rea reason to
>> change, no problems with mine. But if valvoline lubricates better...
>>
>> cal

 

I, like most in this group, don't have any problem switching between most
oil brands. The biggest thing is to do regular oil changes every 3000 to
3500 miles. I am a firm believer in synthetic oil. I've changed it in a
company car after 7000 miles and it feels slicker on my fingers than petro
oil does after 3000. I would advise you to stay away from synthetic blends
if you are going to push the miles between oil changes. I have yet to see a
blend tout it's % of synthetic. If you put a teaspoon of synthetic in a
gallon of oil,... you have a blend. A damn useless one, but a blend! I make
my own blend of 3 qts Valvoline (or Havoline or Castrol or Exxon....etc)
10/40 and 3 qts of Mobil 1 10/30. Years ago when I started in the auto parts
business the prevalent opinion was that Quaker State and Pennzoil, which
are/were Pennsylvania Crude refinements, had higher contents of parrafin wax
and tended to sludge up an engine. I have not used either one in over twenty
years and doubt that either uses exclusively Pennsylvania Crude these days.
My 2 cents worth.

Charles Ervin
81 DJ5L 140,000 miles
84 CJ7 100,000 miles
92 YJ 225,000 miles


"Mike Romain" <romainm@sympatico.ca> wrote in message
news:450EB4A0.494225B6@sympatico.ca...
> Usually when an old engine starts to run too quiet, it is on it's last
> legs and about to blow up. I start shopping about then.....
>
> I 'certainly' wouldn't buy one like that, especially if it's being
> abused like you mention by the person thinking he doesn't need to change
> his oil now.....
>
> Any fool that boasts about engine abuse thinking it is a good thing,
> well....
>
> You have 150K on it. If you do switch, let us know the results please.
> Any old engines I have seen that got switched turned into pincushions
> and leaked oil everywhere.
>
> 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)
>
> Cal wrote:
>>
>> How does the group feel about changing oil brands? I have a 97 GC,
>> 150,000
>> miles. I have used havoline 10/30 every 3000 to 4000 miles since i have
>> had
>> this jeep. I have a friend that changed from havoline 10/30 to valvoline
>> 10/30 full synthetic, and his 4 cylinder sounds like a different engine.
>> I
>> runs much quieter, even after 6000 miles on the oil. He has a '97 with
>> 120,000 miles on it. "In the day", there was much said about possible
>> problems changing brands, different detergents may loosen sludge in the
>> engine, and changing brands was not advised. The difference in the sound
>> of
>> his engine with the valvoline tells me he is getting better lubrication.
>> How does the group feel about changing brands? I have no rea reason to
>> change, no problems with mine. But if valvoline lubricates better...
>>
>> cal

 

I changed to Mobile 1 synthenic at 189,000 miles on my 1994 YJ.
I changed all the oil fluids to synthetic and it runs great. I have
213,500 miles now.


In article <HJkPg.11968$Qg.5444@southeast.rr.com>,
Cal <codom1*IHATESPAM*@triad.rr.com> wrote:
>How does the group feel about changing oil brands? I have a 97 GC, 150,000
>miles. I have used havoline 10/30 every 3000 to 4000 miles since i have had
>this jeep. I have a friend that changed from havoline 10/30 to valvoline
>10/30 full synthetic, and his 4 cylinder sounds like a different engine. I
>runs much quieter, even after 6000 miles on the oil. He has a '97 with
>120,000 miles on it. "In the day", there was much said about possible
>problems changing brands, different detergents may loosen sludge in the
>engine, and changing brands was not advised. The difference in the sound of
>his engine with the valvoline tells me he is getting better lubrication.
>How does the group feel about changing brands? I have no rea reason to
>change, no problems with mine. But if valvoline lubricates better...
>
>cal
>
>


--
Jeeps and dubs and everything's nice...

 

I changed to Mobile 1 synthenic at 189,000 miles on my 1994 YJ.
I changed all the oil fluids to synthetic and it runs great. I have
213,500 miles now.


In article <HJkPg.11968$Qg.5444@southeast.rr.com>,
Cal <codom1*IHATESPAM*@triad.rr.com> wrote:
>How does the group feel about changing oil brands? I have a 97 GC, 150,000
>miles. I have used havoline 10/30 every 3000 to 4000 miles since i have had
>this jeep. I have a friend that changed from havoline 10/30 to valvoline
>10/30 full synthetic, and his 4 cylinder sounds like a different engine. I
>runs much quieter, even after 6000 miles on the oil. He has a '97 with
>120,000 miles on it. "In the day", there was much said about possible
>problems changing brands, different detergents may loosen sludge in the
>engine, and changing brands was not advised. The difference in the sound of
>his engine with the valvoline tells me he is getting better lubrication.
>How does the group feel about changing brands? I have no rea reason to
>change, no problems with mine. But if valvoline lubricates better...
>
>cal
>
>


--
Jeeps and dubs and everything's nice...

 

I changed to Mobile 1 synthenic at 189,000 miles on my 1994 YJ.
I changed all the oil fluids to synthetic and it runs great. I have
213,500 miles now.


In article <HJkPg.11968$Qg.5444@southeast.rr.com>,
Cal <codom1*IHATESPAM*@triad.rr.com> wrote:
>How does the group feel about changing oil brands? I have a 97 GC, 150,000
>miles. I have used havoline 10/30 every 3000 to 4000 miles since i have had
>this jeep. I have a friend that changed from havoline 10/30 to valvoline
>10/30 full synthetic, and his 4 cylinder sounds like a different engine. I
>runs much quieter, even after 6000 miles on the oil. He has a '97 with
>120,000 miles on it. "In the day", there was much said about possible
>problems changing brands, different detergents may loosen sludge in the
>engine, and changing brands was not advised. The difference in the sound of
>his engine with the valvoline tells me he is getting better lubrication.
>How does the group feel about changing brands? I have no rea reason to
>change, no problems with mine. But if valvoline lubricates better...
>
>cal
>
>


--
Jeeps and dubs and everything's nice...

 

On Tue, 19 Sep 2006 21:55:12 -0500, "Charles Ervin"
<charleserv@charter.net> wrote:

>Years ago when I started in the auto parts
>business the prevalent opinion was that Quaker State and Pennzoil, which
>are/were Pennsylvania Crude refinements, had higher contents of parrafin wax
>and tended to sludge up an engine.

I believe that's an urban legend.

RJ

 

On Tue, 19 Sep 2006 21:55:12 -0500, "Charles Ervin"
<charleserv@charter.net> wrote:

>Years ago when I started in the auto parts
>business the prevalent opinion was that Quaker State and Pennzoil, which
>are/were Pennsylvania Crude refinements, had higher contents of parrafin wax
>and tended to sludge up an engine.

I believe that's an urban legend.

RJ