2024 Duramax Mpg. I have heard the generation 1 l5p's were much better in the fuel economy arena. L5p can get as low as 6 mpg towing, or some have seen 13 mpg, all depends on weight, wind resistance, and terrain.
Gm’s and isuzu’s 6.6 duramax turbo diesel v8 was far ahead of its time when it came out, but alas, mpg wasn’t a top priority. A forum community dedicated to chevy and gmc duramax diesel owners and enthusiasts.
