When your car or lawn tractor begins to run roughly or doesn’t seem to accelerate well, you may worry about numerous different parts needing fixing — and about a repair bill approaching several ...

Wall-wetting due to liquid fuel film motion and fuel droplet impingement on combustion chamber walls is a major source of unbumed hydrocarbons (UBHC), and is a concern for oil dilution in PFI engines.

Gas and diesel engines still power most vehicles and look poised to be with us for some time to come, even if their dominance is waning. Any engine that develops its power from burning fuel depends on ...