[Christ]

I actually said that you could compensate for the density by adding fuel... this doesn't work on fuel injection systems though (including diesels, without human intervention)... they don't take fuel density into account. Most injection systems are designed to "assume" a specific density, and inject a pre-set amount of fuel based on "duration" and "pressure".

So - this is a case where you'd have to alter more than just one single parameter of your vehicle to keep things in sync. You can't just heat your fuel and expect to change nothing else, which makes it a moot point.