[Txnavyman10]

I just bought a case of Royal Purple but was kind of dumb for not doing my research first. Is it really so much better than all others. I use 5w 30 which is what is recommended for the car. Anyone else using it that is satisfied?

[EagleAutosports]

I've used Royal Purple in engines, trannys and haven't had a bit of trouble with it. But any other synthetic fluid like Red Line or Mobil 1 is just as good. I won't use anything other than synthetic if at all possible.

[Denver cobra]

It's always done really well in independent tests. A little pricey for my taste.

[.boB]

I use it in my track car; at 6,500 rpms with 140* track temps you need all the protection you can get.

But I don't use it in any of my street vehicles. They just don't get abused like that, and I don't see the need to spend the additional $3 a qt.

BTW, Redline is just as good, it's true synthetic. M1, OTOH, is uses a dino oil base stock and is not a true synthetic. It's not as good and isn't worth the price.

I would use Redline in my track car if it was available locally. But I won't use M1.