always thought 'full synthetic' somehow meant not dino oil. guess it's just marketing. I don't even look at non-synthetic prices. they must have risen to near synthetic prices and synthetic is a lie. used mobil1 in everything for years. seemed good. longer intervals. not another oil thread please.

I just threw out two whole cases of 5w30 last week. they came with my house and were probably 15 years old.

you're telling me that was a bad choice?