Assuming everything else is equal (vehicle size, weight, driving style, tires), how do you make ICE engines be more fuel efficient? I noticed my dad’s 1996 Nissan Pathfinder V6 consumes 13L/100km (mixed driving) while a newer V6 is 9L/100km. Car manufacturers claim their engines are “more fuel efficient”, how do they accomplish that?
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The other commenters say important things, but nobody mentioned engine size size. Your example engines could easily just be different sizes.
Someone.probably said but i didn’t see it. Weight. Newer engines use more aluminium and plastic which are easier to move both forward as part of the car and up and down or around in circles as part of a running engine.
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