I don't trust them any more, I used their joint grease in my rack boots and ball joints and they deteriorated in a year, all brand new parts too! The stuff turned to black dust like baby powder.

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Answer 6

JakeWinslow: 9 months ago

Follow the standerds set in your owners manuel, to acheive max engine performance and keep your car running another 50,000 miles!

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Answer 7

the1stshirt: 9 months ago via iPhone

The best is Mobil 1. Everyone else just try's to copy their formula. I have used it for years in a variety of cars. Two of them went over 300,000 miles when I sold them. They are still running with new Owner's

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Answer 8

tetsusaiga83: 9 months ago | Last edited at 4:45PM on 8/2/2012

Mobil 1 full synthetic is the best you will usually find on the shelf or be able to afford. If you can get your hands on some royal purple than that stuff is the best, many track cars can't even make it a quarter mile without purple.

I have a 20 year old honda with 250k (had it since 100k) miles that doesn't lose a drop or even turn dark between changes, I've used mobile syn with mobile filters since I had it, previous owner took it to acura and used their fluids. I use penzoil syncromesh in the manual trans and never had a single problem with it besides the clutch, but that's because I burn it up driving like a mad man every day.