The best replacement for diesel engines is gasoline engines.

The best alternatives to diesel engines are rated as following:
★★★★★  gasoline engines
★★★★  gas engines
★★★  gas
★★★  gasoline
★★★  petrol engines
  petrol
  gasoline engine

Your alternative for diesel engines is not listed? Suggest!
Speaking about diesel engines, one probably shouldn't forget about urea.

Other search terms related to diesel engines and their ratings are:
★★★★★ urea
★★★ starting fluid
You have in mind a companion for diesel engines and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of diesel engines in all years. Click on graph for more.
diesel engines
gasoline engines
gas engines