survey: eng oil and filter
09-29-2010, 03:56 PM
#46
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.0L
I use either Fram synthetic or Mopar brand oil filters and I like either Castrol or Mobil 1 5W 30, but if I use the Mopar filter (in summer) I don't use synthetic. I only use 5W 30 because I live in a climate that could change from +20 to -20 Celsius overnight, and 10W is too thick for life in Canada. I've heard good things about Rotella T though, with a lucas add. What are your guys' normal oil pressures? Mine changes with different filters and oil, so I'm just wondering what is average?
09-29-2010, 06:31 PM
#47
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Year: 1990
Model: Cherokee
Engine: 4.0
They'd still recommend 10w30. Tolerances of today's engines are much tighter than they were 15-20 years ago. Newer Jeeps (from roughly 2000 to current) all call for 5w30 in the manual or on the cap. I have even seen a few with 5w20 recommended.
09-29-2010, 06:35 PM
#48
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Year: 1990
Model: Cherokee
Engine: 4.0
My 1990 runs just a little under half on the gauge when I'm driving, it drops to just over 10 at an idle. But I have 200K on the engine, and I'm thinking of rebuilding and stroking it out...
09-30-2010, 09:36 AM
#49
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Location: Michigan
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Year: 1999
Model: Cherokee
Engine: 4.0L I6
Im so confused going through this? I have been using 5w30 and now its getting closer to winter should i just keep it? This makes it confusing on what to use
09-30-2010, 11:20 AM
#50
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I always ran 10w-30 and never had an issue when I was living up there (24 years). My dad's one of the only guys I trust with vehicles and he's run 10w-30 in every car he's had. He's lived in MI his whole life and does everything to his vehicles himself. I think the lowest mileage vehicle he's had before selling it was the Chevy Astro with 220k on it. Still ran like a champ and didn't leak a drop.
09-30-2010, 12:13 PM
#51
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Location: Michigan
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Year: 1999
Model: Cherokee
Engine: 4.0L I6
ha wow. thats wild. where in michigan. I decided to do 5w30 because thats what ive been running and its been running good with no leaks.
09-30-2010, 05:04 PM
#54
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Location: Houghton, Michigan
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Year: 1996
Model: Cherokee
Engine: 6 Cly 4.0 HO
im from the U.P. by houghton and i run 10w 30 year round works for me but if you say that 5w 30 doesnt leak maybe i will try that and see what happens
09-30-2010, 05:19 PM
#55
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Year: 1999
Model: Cherokee
Engine: 4.0L I6
09-30-2010, 07:58 PM
#58
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Year: 1999
Model: Cherokee
Engine: 4.0 High Output
Valvoline 10W-30 Full Synthetic with FRAM Extended Guard. Works great but best oil ive used was probably Castrol Edge. Want to try royal purple badly though....
10-01-2010, 09:36 AM
#60
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Year: 1996
Model: Cherokee (XJ)
Engine: 4.0L
Really? I have a 99 and my book says 5w 30 is good for any weather, and to only use 10w 30 above -5 C. I use it during summer too, never had any leaks or problems, it can get up around 35 to 40 C here, and -30 to -40 during winter