# Fuel Economy Calculation

There are 2 possible routes in the morning. A 19 Mile route (which is mainly motorway). Average speed is 60 Mph and the average mpg is 45. Or a 11 route, flat ground but it's mainly city so the average speed is 30Mph and the average mpg is 30. I would like to know which one would be more efficient and how would this be calculated. Thanks.

• What you are not factoring in is the wear at tear on all the components - motorway driving tends to use the clutch less for example while city driving may involve several stop / starts using the clutch etc etc... Feb 21, 2018 at 9:41
• Assuming I would get the same MPG figures, I would choose the faster motorway route even on my hybrid vehicle that doesn't have clutch / transmission synchronizers and that primarily uses regenerative braking, saving the wear and tear on brake pads and discs (in reality, on hybrid highway MPG is about the same as city MPG). You didn't say you have a hybrid, so I think you save much on brakes, clutches and synchronizers on the longer highway route. And as a bonus, you save some time too. Feb 21, 2018 at 14:31
• Sounds like a homework question. Feb 21, 2018 at 17:08