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I have a 2010 Jeep Liberty with the 3.7 V6. I have been using the recommended 5w-20 conventional oil in it but recently found a super deal on some 0w-20 full synthetic. Is there any problem with running the 0w-20 synthetic in my Jeep?

I'm curious as to why the manufacturer always says NOT to extend oil change intervals whether or not you use conventional or synthetic oil. I've read a lot of comments on here about the benefit of synthetic oils being extended OCIs. BUT, . . my owners manual specifically says to use 15W-40...

Does anyone know who makes the Mopar MaxPro 15W-40 CJ4 Diesel oil? I know that Pennzoil makes all of their gasoline engine oils. Pennzoil is also the maker of their factory fill oils and the bulk oil supplier to their dealerships. The difference here, is that the Cummins engine has, at least in...

I bought a new 2010 Jeep Liberty Ltd a few weeks ago and joined the online Jeep Forum group to learn more about it from other owneres. So far, with 656 miles on the odometer, the wife and I are loving this small but very solid feeling SUV with it's 3.7 V6. My question is about the first oil...

My dealer tells me that Mopar is in the process of changing oil suppliers from Mobil to Pennzoil for it's Mopar MaxPro packaged engine oils. I've used Mopar Max or MaxPro since the '70s in my vehicles and want to continue so is Pennzoil as good as Mobil? My new Jeep Liberty calls for 5w20 which...

If I use 3 quarts of 5w30 Mopar oil and 3 quarts of 10w30 Mopar motor oil in my Grand Cherokee 4.0L, (it takes 6 quarts) will I get a 7.5w30 oil? Are there any problems with doing this?

I have a 2005 Dodge Ram 2500 4x4 Diesel. I'm considering switching to synthetics in the tranny (G56 manual), transfer case, and diffs. I went to the local dealer and they said that the factory fill in the tranny and transfer case was ATF+4 which IS synthetic. And the factory fill in the diffs...

I have a 2005 Dodge 2500 Cummins diesel pickup that has only 6,000 miles after 27 months of ownership. The reason is that the truck is used only about once every 7-10 days for running errands around town and about every 2 months during warmer weather to tow a 5th wheel camper. My concern is that...

I've been using Mopar Oil in all my vehicles for years with no oil related problems but have often wondered who makes it for them. The service guy at the dealership said he "thought" it was Mobil. Does anyone here know? The reason I use Mopar is that by using my Dodge Visa card, I accumulate...