Originally Posted by Werks

Yep, that is correct. The issue is the higher oil content reduces the amount of methanol in the fuel. Methanol vaporizes in the combustion chamber at a relatively low temperature and when it does so it has a heat wicking effect which cools the combustion chamber. This means that the operating temperature of the engine is reduced so you can lean the engine out for additional power/run time. An additional benefit of the increase in methanol content (in addition to the reduction in combustion chamber temperature mentioned above) that is not often talked about is that methanol has a really high effective octane rating or anti knock index give you the ability to safely run a lower deck height hence increasing your engines compression ratio with less likelyhood of pre-detonation.

Regards,

Ron