Quote:
Originally Posted by serialk11r
If you want maximum mpg just for bragging rights, you want the highest BTU/gallon mix that barely hits the octane requirement. That means mixing something high octane like toluene or paraxylene with diesel. ECUs are generally programmed to only use spark to compensate for knock, so you'll lose efficiency quickly if you drop much below the recommended octane rating.
|
To which extent the lower-octane fuel blend might be so effective is arguable, as a much leaner fuel trim in order to benefit from the higher energy content may lead to knocks.
Quote:
|
Biodiesel harms cars because it has methanol, while normal diesel should be fine, I think.
|
Pure methanol tends to be more harmful, plus most newer car fuel systems and replacement parts such as fuel hoses are now more resistent to alcohols in general.