Originally Posted by
1QwkSport2.5r
I get that the engines are designed for a given fuel, but I don't entirely follow how using this oil would make it a "non-normal" fuel.. is it just a matter of using less oil because it's a better oil?
Well, yes, it is a better oil and you don't need the amount of oil that was for 50's engines with their metallurgy and tolerances (even with other oils).
But it also has a very low viscosity, so that can be a 'problem', at least in car engines. It also tunes differently, and I think that's one reason why people have had problems with this type of oils.
But it's all worth it in the end!