What mods have improved your mpg?

[MPLFoster]

Racing Dynamics chip on my 325i got me a couple more mpg on the highway. Averaging 25mpg with mixed driving. Was getting 23mpg before the chip. Straight highway driving i can get 30mpg.

A chip/tune seems to be a great way to improve power AND efficiency.

[Dj Buttchug]

drag coefficients

[squidmaster]

Was getting 22-24 with completely stock m20b27
now I get 25-28 with 2.7i and a tune, hchf (half city half freeway). I definitely dog on it at times, too. Full interior on a four door.

[lukeADE335i]

The original 1.3L CRX could achieve 70mpg highway, but that was JDM only - the US market 1.5L achieved 42mpg city / 51mpg highway in EPA tests.

[anabolice30]

Or, find an '84 Honda Civic CRX - 50+ MPG in the city, even better on the highway.

Bullshit.

[slaterd]

Many people have talked about not having a lead foot, but someone on this page mentioned keeping the tach in the powerband. True. I tried granny driving my 318is for a while to try and squeeze out max MPG, all it did was lower my MPGs.. Not sure about other E30's but M42's love to be worked hard.

Or, find an '84 Honda Civic CRX - 50+ MPG in the city, even better on the highway.

That was I ha. I figured that out by working at Nissan. They use a CVT transmission and they get amazing gas mileage because the CVT keeps the engine in the powerband. I also noitced that the mpg meter was shit when accelerating below powerband, under 2k. Above 2k though it spiked up about 5-10mpg.
I always thought, higher rpm's, more fuel cycles, more fuel being used. But there's alot of different considerations when it comes to mpg.

[Rose E30]

I try to use the cruise control on long flat parts of my drive. I think the computer does a better job than me of applying a gentle throttle.

[Threehz]

Many people have talked about not having a lead foot, but someone on this page mentioned keeping the tach in the powerband. True. I tried granny driving my 318is for a while to try and squeeze out max MPG, all it did was lower my MPGs.. Not sure about other E30's but M42's love to be worked hard.

Or, find an '84 Honda Civic CRX - 50+ MPG in the city, even better on the highway.

[LowR3V'in]

I once drove like a granny in my old eta to see the milage.
squeezed out 300mi on that tank.

Drive smarter. Cruse more and let off when you see a red. Common sense stuff.
Roll up the windows on the freeway.

[mitchlevy7]

the not driving other people mod.

[nando]

but you can also coast further in neutral due to engine braking. it gets worse when you increase the engine's compression.

depending on the situation, it can be a wash.

[Stanley Rockafella]

This is a slightly old thread, but keeping it in gear and coasting is actually more fuel efficient than putting it in neutral. When in gear and coasting, the computer doesn't send any fuel to the engine since the wheels are keeping the engine spinning, but in neutral, the engine is idling which uses slightly more fuel.
http://www.popularmechanics.com/cars...l-fuel-economy

true

just look at the mpg meter, you'll see it pegged at 0 when your in gear and coasting. As soon as it goes into neutral, you'll see it go up/

[TimbyMaTombo]

I free wheel down any downhill grade. Just slap it in neutral.

This is a slightly old thread, but keeping it in gear and coasting is actually more fuel efficient than putting it in neutral. When in gear and coasting, the computer doesn't send any fuel to the engine since the wheels are keeping the engine spinning, but in neutral, the engine is idling which uses slightly more fuel.

http://www.popularmechanics.com/cars/alternative-fuel/news/coasting-in-neutral-fuel-economy

[slaterd]

I have the drive downhill only mod.

I free wheel down any downhill grade. Just slap it in neutral.

[u3b3rg33k]

I lost around 1mpg switching from a 3.73 to a 4.27 rear end with sticky tires. Average 21 mpg overall - which includes letting the M20 sing Italian style often (keeps the carbon out).