From 38mpg to 45mpg on 07 hatchback by hypermiling and detailing exterior

[thebarber]

Buy skinnier tires.

I went from 175 to 195 and lost 5mpg (6L/100km to 6.8L/100km) doing 100% highway at 80mph

[07liftback]

Originally Posted by Ilovemyyaris

Maybe... you're mostly going up hill?

I notice I get about 42 mpg going to my grandparents house, coming back I get about 47 mpg semi consistently. Back road going about 45 to 50 mph. Apparently grandparents house is at a higher elevation.

ALso, unless I'm within a car length distance with big trucks I don't notice much mpg increase. I have to be pretty close to them and cop pulled me over once and explained he wasn't too happy to see that. Legally you need to be within two car lengths he explained but didn't recommend doing that either.

Anyways I only got like 3 maybe 4 mpgs extra from that distance. I think I might get 1 or 2 mpgs at two ish car lengths behind big rigs. Which of course is better than nothing as it adds up. Going 70 on the highway gets me about 38 to 39 mpg within 100 miles. Same distance behind trucks got me 40 to 42 mpg. Of course it seems like the farther I go the better mpgs I get. went from georgia to michigan and got about 47 mpgs on the highway but it took a few hundred miles to max out mpgs. And of course on the way up and on the way back I got different mileage. but I believe 47 was the average for both trips.

I think there's some correlation between mpg and geography. Many have stated that gasoline sold in CA nets worse mpg compared with the rest of the country. I'm usually behind trucks at least 3 car lengths to avoid any sudden braking for whatever reason. I've had people cut me off last second and slam their brakes to try and scam me for insurance money.

Also, some of the trip on the way back from Southern California did have uphill climbs but it only lasts 10 miles or so.

Originally Posted by thebarber

Buy skinnier tires.

I went from 175 to 195 and lost 5mpg (6L/100km to 6.8L/100km) doing 100% highway at 80mph

I would try skinniner tires but I recently got into a near collision. I was inches away from rear ending someone who cut me off on the freeway and slammed their brakes to a halting stop. If I had skinniner tires (less tread contact), I definitely would've slammed right into him.