oil weights
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From: Jacksonville, NC
Year: 1993
Model: Cherokee
Engine: I6 4.0L HO
Originally Posted by odgreen89on35s
Ignore them. Trolls. Ban soon to come
And i thought that person was banned once
CF Veteran
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From: some small town oregon
Year: 1989
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Different user name. Different ip number.
Nothing can stop them. We ban and they just troll back. If your on a pc and click the pic it takes you to a website.
Nothing can stop them. We ban and they just troll back. If your on a pc and click the pic it takes you to a website.
::Regional Moderator::
Joined: Aug 2011
Posts: 4,742
Likes: 10
From: Jacksonville, NC
Year: 1993
Model: Cherokee
Engine: I6 4.0L HO
Originally Posted by odgreen89on35s
Different user name. Different ip number.
Nothing can stop them. We ban and they just troll back. If your on a pc and click the pic it takes you to a website.
Nothing can stop them. We ban and they just troll back. If your on a pc and click the pic it takes you to a website.
I put MB1 HM in mine and have been doing it since I got it. I always use the mopar oil filters as well. They sell em' at Walmart for cheap and the jeep seems content with that combo for now. Eventually as it gets older (and my oil leak worsens) I am going to switch over to 15w40. I've got about 140k miles on it now almost.
Seasoned Member
Joined: Aug 2011
Posts: 344
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From: California
Year: 1989
Model: Cherokee
Engine: 4.0 i6
Originally Posted by UsmclovesXJ
Thats debateable
If you want thick oil then prepare for engine wear. You can run 0w-30 and be perfectly fine. And for those who will say that it wasn't meant for that oil I have this to say. Better oils weren't around but it doesn't mean it will not work. The thinner oil will be better for cold starts and reach it's operating temp quicker. Just because you don't live in a cold place doesn't mean you can't use that oil.
90% of engine wear is at start up until it warms up to normal operating temp.
If you want thick oil then prepare for engine wear. You can run 0w-30 and be perfectly fine. And for those who will say that it wasn't meant for that oil I have this to say. Better oils weren't around but it doesn't mean it will not work. The thinner oil will be better for cold starts and reach it's operating temp quicker. Just because you don't live in a cold place doesn't mean you can't use that oil.
If you want thick oil then prepare for engine wear. You can run 0w-30 and be perfectly fine. And for those who will say that it wasn't meant for that oil I have this to say. Better oils weren't around but it doesn't mean it will not work. The thinner oil will be better for cold starts and reach it's operating temp quicker. Just because you don't live in a cold place doesn't mean you can't use that oil.
thin oils do make more hp and do pressurize faster, it's just hard to say how much faster a 0-30 would pressurize vs a syn 5-40. i do know that the extra zinc/phos in that 5-40 will be a lot easier on lobes and rings. this becomes even more important if you drive hard. you will also have less oil pressure with the 0-30.
in the end, the only real problem i have with 0-30 in a cherokee is they are all api SN, well, as far as i know. if one actually came with an additive pack that was similar to 90s oil which the engine was designed for. sure, it would work.
Seasoned Member
Joined: Aug 2011
Posts: 344
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From: California
Year: 1989
Model: Cherokee
Engine: 4.0 i6
Originally Posted by racebum
i'm still not 100% sure where this quote came from {the 90%} but i'm fairly sure it's regarding dry starts and the metal on metal wear. modern synthetics have excellent cold flow and a 5-40w T6 rotella will have near instant oil pressure on start up. you can start comparing cold pours and whatnot to figure out what works in your climate. the real benefit to higher zinc/phos oils is the anti wear additive packet. cam lobes and cylinder bores dash rings get hammered with low zinc oil, well, hammered more than higher amounts.
thin oils do make more hp and do pressurize faster, it's just hard to say how much faster a 0-30 would pressurize vs a syn 5-40. i do know that the extra zinc/phos in that 5-40 will be a lot easier on lobes and rings. this becomes even more important if you drive hard. you will also have less oil pressure with the 0-30.
in the end, the only real problem i have with 0-30 in a cherokee is they are all api SN, well, as far as i know. if one actually came with an additive pack that was similar to 90s oil which the engine was designed for. sure, it would work.
Think of the oil like blood pressure. You want high or low pressure? You can always add additives to the thinner oil.
New cars run thinner oils for a reason. Running thicker oil only masks any problems or noises and are sometimes louder at cold start.
You want free flowing oil not slow thick oil.
Last edited by BigBear; Jul 20, 2012 at 02:49 AM.
First priority is FLOW....pressure is just a number and usually an indication of wear and has little to do with lubrication. High oil pressure from thick oil is a BAD thing. If you have a noisy engine with alot of miles 15-40 is about as heavy as I would use.
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