LOL
Don't forget to mention that ANYTHING with the additives... "Linkite" or "Teflon",
should provide large increases in HP and at the same time save on fuel!
My personal fave is when I hear of greater power when switching to a
synthetic oil. "Less friction"
Seriously you have to also look at the HP to be gained when going away from a belt driven fan to an electric fan.
There are many little cumulative HP gains to be made. Just as there are numerous ways to chop weight in a car.
The lists go on.
Tim