Fuel Saving Tips

Fuel economy misconceptions- Engine efficiency

Larger engine not working hard is more efficient than small engine working hard: Wrong If this were true, then things such as cylinder deactivation never would have been conceived, as they would REDUCE efficiency by that “logic”. Engines are efficient at converting FUEL to POWER when they are loaded down. As an example, an idling engine doesn’t use much fuel. Sure, but it also produces VERY LITTLE power. The result is a terrible FUEL to POWER ratio. When you load the engine down by asking it to produce power, it consumes more fuel, sure, but it also produces more power. This time, the FUEL to POWER ratio is much better. Look up bsfc maps.