- Joined
- Nov 18, 2007
- Messages
- 2,023
- Points
- 3,101
- City
- Port Huron, MI
- Vehicle Year
- 2011
- Transmission
- Automatic
I saw a article many years ago that basically said your average car is only getting to use about 3% of the available energy from said tank of gas. diesels about 7%.
most of the energy is lost in things like friction and heat.
Thats a bit low from what I've been taught. Most gasoline non-direct injection, spark ignition engines are somewhere around 30%, with the typical diesel (direct injection, compression ingition) at 38% or 42% (can not remember which one...leaning towards 42% though). All the rest of the energy being lost to what you mention.

