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So I'm needing to change my 2010 Jeep Patriots PTU and RDA fluid. Jeep owners manual page 445 says 80W-90 GL5 or equivalent NON-synthetic product. I searched for this topic but didn't find anything. Does it make a difference if I put synthetic in there? Why would it matter? Thank for your input!

Thanks for all the great replies. Yea had no idea how my oil was doing until one of my buddies told me about this. Just trusted Amsoil I guess. Originally Posted By: friendly_jacek I'm planning to start using amsoil oils @25000 miles OCI as soon as warranty expires on my prius. my wife puts...

First post here on bitog, recommended by one of my best friends. Also first used oil analysis. Have been using Amsoil SS since I got this car with 49K miles on it. I have been changing the oil on average every 16,700 miles. I change the oil filter with an Amsoil filter at 15K miles (or sooner...