Originally Posted By: bigt61
Originally Posted By: Shannow
Fill it with premium, and be wary of hearing some knocking...back off the throttle if you hear it.
Why Premium? It seems to me a diesel mixture would make it harder to ignite/explode? Low octane fuel explodes easier and contains more energy, seems like that would be the way to go. Am I missing something?
jetronic got it.
Looking at the hydrocarbon series, the smaller the chain length, the better the antiknock performance...and it's all compared to "octane", which is 2,2,4 trimethyl pentane, a compact molecule, of pentane (5 carbons) long, with three little branches....it's 100. (Incidentally, "zero" is N-Heptane, which has 7 carbon atoms in a long string).
Diesel is around 13 long, and has a very poor octane rating.
Remember in a diesel, the fuel isn't introduced to the air until injection near TDC...if it were, it would knock like crazy.