FreePenguin
Well-Known Member
But my motorcycles only has a 2-3 gallon tank. I will no longer top up anymore for winter etcThat one gallon of 93 will become so diluted by the 87 (if the tank is full after adding), that the effective octane most likely won't change at all. In order to get the car to see the 93 octane, the tank will need to be run close to empty of the 87 and then the 93 added.
Ie. Like a gallon or less 93, but actually tossing piss in it
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