Originally Posted by Rusty

What do you think is in the Z. Ester oil, which is a synthetic base oil that has been chemically synthesized. And you pay over $20.00 a quart at the dealer for it.

All vehicles leaving the factory has synthetic oil in them. It's all about fuel mileage. And that's why you see cars with 0w20 oil instead of 10w30 now. I gave the Vette and Viper as examples. The Hellcat and Demon come with Pennzoil synthetic.