Quote:
Originally Posted by Fred1956
Which Amsoil do you use?
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Interceptor
Quote:
Originally Posted by jostby
Interesting notes, thanks.
I'm curious, did you use the same brand piston both times?
Did you change from "A" to "B" size or stick with the same piston size also?
I wish I had the drive to keep notes like this  |
First one was a Wiseco, second was a Vertex.
Same size piston.
Quote:
Originally Posted by gasgasman
Did you rejet for the different oil ratios?
More oil in the mixture leans out the fuel/air ratio.
So, in reality the motor was getting less oil.
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I did not rejet since the engine ran fine. I can feel if I am off by one size on the pilot and a couple sizes on the main jet, which it was not.
I would like to see your math.
By my math, I am running 32% more oil per gallon of premix. Correspondingly, there is 0.6% less gas per gallon of premix, which has some small effect on the fuel/air ratio. There would also be some viscosity change, which maybe you have the formula for flow though a jet.
Taking it to the big picture level, I rode the same loops and get consistently the same fuel mileage. By my simple math, I am running about 1/3 more oil through the engine for a given ride.