Hey guys, im new to this site...although ive already spent way too many hours on it. I just bought a 98' Jeep Wrangler with the 4.0 6cyl. Ive spent hours pouring through this forum and trying to take it all in. I want to run a full synthetic because I want maximum protection. Taking care of my car is really kind of a hobby of mine. Right now im running Pennzoil SUV, Truck and Minivan synth. blend. Reason being i have a slight oil leak in the front of the engine b/t the oil pan and engine block. Ive read that full synthetics can cause existing leaks to become worse and/or start new ones. So ive stayed away from the full synthetics. However, the other day i saw an awesome UOA for a 4.0l that was running Valvoline maxlife. I later found that valvoline maxlife comes in a full synthetic that claims to condition seals. Its marketed for vehicles with over 75k miles on them. My jeep has 96k miles on it. So, would this be a safe synth. motor oil to run? Will it make my leak worse and/or start a new one? And i guess the most important question is is this a good synth. motor oil? Also, if any of you guys have a jeep with the 4.0 it'd be great to know what kind of oil your running in it and what you think of it. Thanks guys
jeep 4.0/oil question
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I recommend that you hit the used oil analysis section and type "jeep" into the keyword field. Lots of used oil analysis to look at.
I use RTS (rotella T synthetic) most of the time ..but I'm not getting the result that I want. I wouldn't worry about the synthetic leak thing. Havoline 10w30 seems to be a good choice for this engine. I don't know much about Valvoline in any of its offerings ..so ..others will have to chime in.
Awesome, thanks for the nice welcome and good feedback
Honestly, these engines don't need the "extra protection" of a synthetic unless you plan to run extended drain intervals.
My nephew's 4.0L Cherokee is at 215,000 on plain-Jane whatever's-on-sale dino changed at 5k intervals. And 215k is just getting broken in.
Seriously, the rest of the vehicle will fall apart around the perfectly functional engine.
My nephew's 4.0L Cherokee is at 215,000 on plain-Jane whatever's-on-sale dino changed at 5k intervals. And 215k is just getting broken in.
Seriously, the rest of the vehicle will fall apart around the perfectly functional engine.
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