Want to get more power and better fuel economy out of your engine? Of course you do! If you’re expecting a recommendation for the latest snake-oil fuel additive, that’s a fair guess, but you would be wrong. Actually, the key to all those claims isn’t some magic potion, but rather optimizing your engine’s squish clearance.
 
In this video from the MC Garage, Senior Road Test Editor Ari Henning will explain the concept of squish and then walk you through the steps required to check and adjust this critical engine clearance. engine squish.
 
True, checking squish is an advanced topic for the average home mechanic, but it’s actually one of the fundamentals of engine building, so even if you don’t intend to ever check squish, it’s worth knowing about.