top speed and gas mileage

[Ygransom]

Now I'm curious. Who's running 89 octane & who's running 91 or higher octane? I've been running nothing but 91 & I'm getting about 35 mpg.

Running 87 octane getting around 37 mpg

 

[HellFire]

Unless you are running turbo's or superchargers like G, premium is not only wasting fuel and money, but can do damage over time as well. The R3 is a low compression engine and will not completely burn up high octane gasoline.
It runs best on the the cheap stuff.

 

[rayjay]

Unless you are running turbo's or superchargers like G, premium is not only wasting fuel and money, but can do damage over time as well. The R3 is a low compression engine and will not completely burn up high octane gasoline.
It runs best on the the cheap stuff.