Dimples on a car does increase highway fuel economy
Drafting within 200 feet of a large truck does increase fuel economy
Driving with the tailgate down (not on cobalts :blink1 decreases MPG
Electric superchargers have not been proven to help fuel economy
Those tornado or vortex things that go in the intake line do not increase MPG
Those "chips" that retune the IAT to 30 degrees decrease fuel economy
Anything claiming to increase your MPG by more than 3 is false
Vortex generators do not help mpg's on a cobalt at least
Gas treatment, fuel injector cleaners, things like that do help fuel economy but not immediately, more in the long run by keeping the engine cleaner
From what I have found using a scan gauge II auto computer that reads gallon per hour of fuel used, I have found that idling in neutral uses .1 GPH less fuel than drive
Coasting on a highway in 5th gear will read 0.00 GPH at roughly 2500 RPM depending on speed, but in neutral it will read .3-.4 GPH at less than 1200 RPM.
An intake and exhaust will usually increase MPG and HP and are pretty much the only two items that can legitametly increase both MPG and HP at the same time. The only reason the factory gives you shitty intakes and exhausts are to keep the cars quiet.
Underinflated tires can greatly decrease MPG so keep them inflated.
Low rolling resistance tires increases fuel economy
Weight reduction mods increase fuel economy
Streamlining a car increases aerodynamics and usually helps
From what i've found, is that using the AC at idle increases GPH by .1-.15 no matter what setting it is on.
Higher octance gas usually increases MPG but mostly on the highway
Magnetic fuel Ionizer things are garbage
Some other things that don't hurt MPG but some people claim that they increase MPG but these aren't really proven are tint (less strain on the AC), lowering the car (better aerodynamics), certain designs of spoilers, synthetic oil vs regular oil, higher performance battery and alternator (less gas to spin the alternator if it runs better),
The biggest ways to increase MPG are simply change your driving habits. That can be a new thread though.
Drafting within 200 feet of a large truck does increase fuel economy
Driving with the tailgate down (not on cobalts :blink1 decreases MPG
Electric superchargers have not been proven to help fuel economy
Those tornado or vortex things that go in the intake line do not increase MPG
Those "chips" that retune the IAT to 30 degrees decrease fuel economy
Anything claiming to increase your MPG by more than 3 is false
Vortex generators do not help mpg's on a cobalt at least
Gas treatment, fuel injector cleaners, things like that do help fuel economy but not immediately, more in the long run by keeping the engine cleaner
From what I have found using a scan gauge II auto computer that reads gallon per hour of fuel used, I have found that idling in neutral uses .1 GPH less fuel than drive
Coasting on a highway in 5th gear will read 0.00 GPH at roughly 2500 RPM depending on speed, but in neutral it will read .3-.4 GPH at less than 1200 RPM.
An intake and exhaust will usually increase MPG and HP and are pretty much the only two items that can legitametly increase both MPG and HP at the same time. The only reason the factory gives you shitty intakes and exhausts are to keep the cars quiet.
Underinflated tires can greatly decrease MPG so keep them inflated.
Low rolling resistance tires increases fuel economy
Weight reduction mods increase fuel economy
Streamlining a car increases aerodynamics and usually helps
From what i've found, is that using the AC at idle increases GPH by .1-.15 no matter what setting it is on.
Higher octance gas usually increases MPG but mostly on the highway
Magnetic fuel Ionizer things are garbage
Some other things that don't hurt MPG but some people claim that they increase MPG but these aren't really proven are tint (less strain on the AC), lowering the car (better aerodynamics), certain designs of spoilers, synthetic oil vs regular oil, higher performance battery and alternator (less gas to spin the alternator if it runs better),
The biggest ways to increase MPG are simply change your driving habits. That can be a new thread though.