Guys...rating engine by how many gallons they last isn't an accurate means to measure engine life at all...... The cheap Taiwanese engines are usually very hard on fuel and burn thru fuel much faster then a quality race engine.....A Mach 427 may get 8 minutes per tank meanwhile my modded Werk's B5 can get 14 minutes per tank.... So if they both last 8 gallons the modified B5 actually last nearly double the lifespan..... Guys who have these cheap engines bragging up how many gallons they can guzzle in a lifetime is meaningless....My Chevy Big Block truck gets 6MPG and my Toyota Corrola gets 30MPG...are we going to compare their lifespan by how many gallons each consumes ? Cheap engines guzzle fuel, expensive engines miser fuel.....In actual on the ground running time a quality engine will have significantly longer lifespan then some cheap Taiwanese engine..