You might have to retune sinc ethe nitro fuel industry is not regulated much like 87, 89, and 93 octane gasoline is regulated. There can be a very wide difference from ful brand to the next. For example, O'Donnels and Byrons do not use as much oil in thier blends like Traxxas might. The Traxxas fuel might be easier to start on, but its oil content in turn might cause a one way bearing to eventually to slip.