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[–] 0 pt

While I don't have the numbers on hand, I do know that several things will throw your calculations off by some amount.

  1. Diesel fuel is not pure C12 H23 . There are lots of chemicals added for various purposes.
  2. No engine will perfectly burn the fuel even if the fuel is perfectly pure and feed pure oxygen.

Combustion is a messy process and when you throw in the fact that diesel naturally has impurities, and that additives are mixed in, and then that it is burned in air which is composed of many elements and chemicals you get a veritable soup that only gets even more complicated when the actual combustion starts.

These factors may throw off the real world numbers by a significant amount.

Oh yes it can get much more complicated. This was a gut check and just to check if their number of 23lb per gallon of diesel is in the right ball park.

[–] 1 pt

Oh yeah. A lot of replies are saying M=(fuel + oxygen) when it is actually M=(total input - total energy). The "total input" and "total energy" parts are vastly oversimplified most of the time. These oversimplifications have little consequence in most situations but this was just nagging me. Probably need my meds.