Oil Prefrence

[Advent]

Just a quick note... while castrol is a good oil, they actually had the definition of synthetic changed because their oil is not a true synthetic, but a really pure base oil. It's on the web. Like I said, good oil, but if I'm paying synthetic prices, I want synthetic.

It actually used to be full synthetic. But they figured out that they could make it cheaper using a dino oil base stock. It's still the exact same formulation as it was before.