Help Me Get Better MPGs

[iceminion]

unplug 2 of the fuel injectors, one on each bank, it will run ok but not have a lot of power, and possible use 1/2 the fuel.

~John

Thats funny, I was under the impression that a car, any car, would be most fuel efficent running at 20% throttle on all 4 cylinders rather then 40% throttle on half dead cylinders.

Who knows! you might be onto something, just like that DEI guy

[xveganxcowboyx]

unplug 2 of the fuel injectors, one on each bank, it will run ok but not have a lot of power, and possible use 1/2 the fuel.

~John


On a four cylinder?


My stepfather has a newer legacy with the 2.5 liter and pulls high twenties or even thirties on the highway. He usually cruises less than 65 on the road he usually drives, but can still get high twenties even at 75 or eighty. Your gearing might be steeper though, which would hurt your high speed mileage some.

The tired engine may be the culprit. Any compression numbers?

[blageo23]

Too much work to do a compression test :).

[Pushit2.0]

Its a flat motor, we had a subaru on the dyno that made just about 1/2 the power it was supposed to and to our suprise it was only firing 1 cylinder on each side.

~John

[xveganxcowboyx]

Good to know. So apparently the boxer design keeps things rotating nicely eh? That's really cool.

And I hear the PITA argument about the compression test. I get annoyed just *thinking* about working on one of those.



Its a flat motor, we had a subaru on the dyno that made just about 1/2 the power it was supposed to and to our suprise it was only firing 1 cylinder on each side.

~John

[Andrew7dg]

unplug 2 of the fuel injectors, one on each bank, it will run ok but not have a lot of power, and possible use 1/2 the fuel.

~John

yeah you are joking on that right?...:hah: because the cylinders that aren't firing will be adding drag on the engine making it less efficient.

Back on topic.
take as much weight out of the car as possible. Stuff adds up in weight in a car.

And I agree with driving at closer to 65. Even in my DSM manual it states to get the best MPG, drive 55 miles an hour. I got 23-24 with mine with very conservative driving this winter. However I like my dsm so the next tank of gas went down pretty fast.

[Pushit2.0]

Joking on all but the fuel used, the car did run ok, it was just 1/2 the power it was supposed to be.

~John

[niterydr]

Joking on all but the fuel used, the car did run ok, it was just 1/2 the power it was supposed to be.

~John

"Ran okay" meaning it sounded okay, afr was fubar and the car was weak on power.
But it is hard to but check a boxer motor to see if they are off. If you don't know how they are suspose to sound exactly, they can be off.

I have my tires over inflated in my nissan and drive like a grandma most of the time, 33-36mpg FTW!