We found one dictionary that defines the word lean burn engines:

General (1 matching dictionary)

1. lean-burn engines, lean-burn engines: Collins English Dictionary

▸ Words similar to lean burn engines ▸ Usage examples for lean burn engines ▸ Idioms related to lean burn engines ▸ Wikipedia articles (New!) ▸ Words that often appear near lean burn engines ▸ Rhymes of lean burn engines ▸ Invented words related to lean burn engines