The research and development department is looking for ways to improve engine efficiency for a gasoline engine that they'll use in a car.
Which changes would increase engine efficiency for the gasoline engine?
(Select all acceptable answers.)
Use gasoline with a higher octane value.
Use the engine at the lowest possible RPM point.
Use the engine at the highest possible RPM point.
Increase the compression ratio.
Inject more fuel than needed to burn all available oxygen.
Add a catalytic converter.