We did some research at our Marina because we sell Volvo engined boats, and they specify a synthetic oil. The Volvo oil is very expensive, and hard to find when you need some, so we needed an alternative. The one we came up with was Mobil 1 because it was the closest to the Volvo in properties, and it available everywhere at a better price.

I have run it in my own cars, and the temp drops and the HP seems to rise, at least in seat of the pants feel.

JMO,

Don