Toluene write up

[John Shost]

Marc Swanson <mswanson at sonitrol.net> wrote:
You took a different approach than my testing which will be to monitor performance rather than fuel economy.  I'm surprised that you achieved better mileage with higher octane fuel.  Can anyone out there explain why this might be the case for Ron's normally aspirated 5k?

Toluene is denser than gasoline. If your car has O2 feedback it will reduce the volume of fuel injected to compensate.

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