Very over-rated, may be fine for stock and 'stock like' modded cars but it doesnt hold up at 4x stock ouput, shears and wont hold viscosity. I have also run Pyre Power products and they are very good + the owner will do special additives if you have a need. He added Zinc to mine for added wear prevention. I also ran some Joe Gibbs oil and it was very nice, just very expensive. They make a really good dino breeakin oil.