Originally Posted By: uazj1
Originally Posted By: Gary Allan
Originally Posted By: Steve S
why would you want to switch to syn oil?
He's someone who happens to have an engine that appears to be void of a variety of issues that could have resulted in various levels of deposits. Everything from nothing to severe. The previous owner probably over maintained it ..and maybe he did too.
Look at the date of manufacture. This engine is 14 years old (I didn't catch the current mileage?) ..and doesn't even have "normal" accumulations that one would expect.
The previous owner definitely didn't over maintain the Jeep. I'd imagine the oil change intervals weren't great, this guy wasn't really a car person. So after 80k miles of not so great maintenance, no oil change or service records, I switched to synthetic and at 136,000 miles the engine is clean. I would have expected at least some build up. If the engine were continually fed dino oil at longer OCIs I bet the pictures would look a lot different.
First of all
What are your OCI from 80k to 133k?
I've got a few family members who live in San Diego (one in Lakeside, one in Vista and my 1986 VW jetta (332k) lives in Chula Vista now) and the one in Lakeside has a 318 Jeep and it is as clean as yours (it is a little cleaner, more metal color BUT he has had it since *new*). He has only run QS 5w-30 / 10w-30 green bottle @ 5-6k OCIs. Fram oil filters too!
Your weather down there helps on abuse on engines. It does get hot in Lakeside but for a week here and there. Not like here where we see 90s plus every day from May till Sept..(it was 98 yesterday) go 3 months from now and it will be freezing every night and most days.
I do have an off topic question... Front disk pads. My uncle has the same gen Jeep as you and his 5.2l automatic EATS disk pads like gas. If he can get 20k on a set and 35-40k on a set of rotors he would be lucky.
With 133k you have had it long enough how is your front brakes and their life?
Thanks, Bill