What gets better mileage a 4 cylinder or 6 cylinder?

Generally, a 4-cylinder engine gets better gas mileage than a 6-cylinder engine. This is because 4-cylinder engines are smaller and require less fuel to operate. However, this is a generalization. The actual mileage depends on many factors including:

* Engine size and design: A very large 4-cylinder could be less efficient than a small, efficient 6-cylinder.

* Vehicle weight: A heavier vehicle will always have lower fuel economy regardless of the engine type.

* Transmission type: Automatic transmissions typically have slightly lower fuel economy than manual transmissions.

* Aerodynamics: A more aerodynamic vehicle will have better fuel economy.

* Driving habits: Aggressive driving significantly reduces fuel economy.

* Technology: Modern fuel-saving technologies can impact mileage significantly in either type of engine.

So while a 4-cylinder is *typically* more fuel-efficient, it's not a guaranteed outcome. You should always check the EPA fuel economy estimates for specific vehicle models to get the most accurate comparison.