Jeep Wrangler Forum banner

Pick more than one that fits you habit

  • Pennzoil

    Votes: 7 10.0%
  • Mobile

    Votes: 21 30.0%
  • Other Major brand (Valvoline, Castro or Quacker)

    Votes: 26 37.1%
  • It doesn't matter I use what Brand is on sale

    Votes: 8 11.4%
  • Conventional

    Votes: 19 27.1%
  • Semi-Synthetic

    Votes: 5 7.1%
  • Full Synthetic

    Votes: 29 41.4%
  • Change Every 3000 Miles or less

    Votes: 20 28.6%
  • Change Every 4000-6000 miles

    Votes: 35 50.0%
  • Change over 6000 miles

    Votes: 9 12.9%

Lets talk about Engine Oil for Jeeps

32K views 41 replies 27 participants last post by  Blind Dog 
#1 ·
Poll is attached, but feel free to explain what oil brand, type, how many times you change the engine oil and why it works for you and you jeep. This is not a competition its a survey.
 
#32 ·
There are bad oils. They are always these small no-name brands (not the small exotics). There are several with such low viscosity that they can instantly harm your engine. Best to stick with the big names and the exotics (redline, Motul, Motorex, Total, etc)
 
#35 ·
Another good one is the Valvoline Durablend. Solid UOAs.
 
#37 ·
Mobil1 0-40 full syn,change every10,000 miles, Mobil 1 filter. If not that Mobil1 5-20 extended performance still change at 10,000 miles. I read everything I could find on oil when I had two Miata's. Started with Amsoil-it is not without it's own issues and is generally more expensive than M1 and obviously harder to get. Like I said you can read about this stuff for hours including lab tests and engineering studies but the bottom line is full syn M1 and change at 10k. You can go to 13k or so with no harm but things do start to degrade at 10k ever so slightly. My Mercedes typically went 12 to 13k between a change was called for from the on board computer. I lived in Phoenix! Admittedly, the Mercedes held nine plus quarts of oil. Stop wasting your money on too frequent oil changes. BTW 10W-30 full syn is a meaningless number as it relates to DINO oil. It is also a poor choice. Go with one of the two I mentioned at the start. It is made up so the consumer thinks he knows what he is buying.
 
#38 ·
Quaker State Defy, 10W-30. 3000-5000 miles or 3-5 months. (this is a syn. blend with about 900 ppm "zinc" according to what I read.)

QS is a SOPUS (Shell) product same as Pennzoil.
The only thing Pennzoil has in common with the old Pennzoil is the yellow bottle since 2002, when Shell bought the name and reformulated it. I think it is one of the best out there now. I see a lot of bagging on PZ from people who cheerfully use Shell motor oils like Rotella, but it's the same company now.

Besides, a lot of old engines sludged regardless of what oil was used, and since Pennzoil was the one of most used oil brands, I strongly suspect that even the old Pennzoil got unfairly blamed for that most of the time.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top