What mods have improved your mpg?

[einhander]

I have the drive downhill only mod.

[slaterd]

^I don't let it get above 1/2. Everyone tries saying you get better mileage with a full tank, but then I introduce them to a new trend called physics. Hasn't really caught on yet.

[antil33t]

Don't fill your tank unless needed (lots of weight there).

Haha... I never let my car go below 3/4 mark... about 60L.

I thought the car already weighed 1.6tonnes so why not :S (e34T)

[iwantspeed]

weight reduction
engine maintenace
new fuel injectors and fuel filter
driving habits

http://ecomodder.com/forum/EM-hypermiling-driving-tips-ecodriving.php

• 2,460 lbs
• no driver
• a little over half a tank of gas
  
  
  engine
  • no ac
  • no power steering
  • no windshield wiper bottle
  • wiring shortened
  • brackets removed
  
  
  interior
  • no carpet
  • no sound deadening
  • no passenger seat
  • no rear seat
  • no rear speaker
  • no speaker shelf
  • no rear seat belts
  • no center console
  
  
  trunk
  • no mat
  • no carpet sides
  • no sound deadening
  • no tool kit
  • no spare tire
  • no jack
  
  

im happy with that.

[TobyB]

I found that the cage did NOT improve economy OR lap times...

t

[shaferbm]

I noticed a 2-3 mpg decrease when I did it to my nice, rare E30 Touring that needed some cosmetic restoration.

I only left a small hole for me to fit in , all other open space was welded shut.

Haha what a troll. Nice try.

[unevolved]

I'm only getting about 26 on the highway out of my stock M42, I think I've got a lot of room to improve.

[slaterd]

I just watched my mpg-o-meter in relation to gears, rpms, and speed to see where my optimum power band is. Don't go for the least amount of rpms, try to stay where your car's engine is running most efficiently except when on highways. Air up your tires, keep stock wheels, prevent any obstructions aerodynamically, AC on instead of windows down at high speeds, keep up on maintenance. That's all you can do. All of it is in your driving.

[TwoJ's]

LIke already said, if you get rid of your big ass wheels you will notice a significant increase in mpg. Rides better/quieter too...

[Wishno87]

2.79 diff. Keeps me out of VANOS on the freeway.

[jw 325ic]

Moar low and is lip helps

This. Plus new fuel filter and slightly taller tires.

[Wild Ride]

175s are great in a straight line but they keep you from maintaining all your momentum in a turn like r comps will.

[Stanley Rockafella]

For when gas prices go back up I've thought about super fuel miser mode: 175/75-14s and a taller diff, although I think the dark side will win out and it's eventually going to wind up slammed on 15x8s and retired from commuter duty.

Actually it's 175/70/14 and OH boy does it help fuel economy! it also reduces road noise (in my application as my Kumho's are noisey as hell). Not to mention road imperfections are greatly muffled too.

Tho the other awesome thing I enjoy is in ANY light rain or moisture on the road will cause the car to easily drift! You really gotta stay on monitoring how hard you accelerating, as the back end will break out when driving in daily traffic and attempting to accelerate briskly from a rolling start. Honestly, I don't mind as I can easily keep this old gal in between the lines ;)

[Wild Ride]

Maintain as much momentum as possible through turns and look down the road to anticipate stops and lane blockages.

An m20b25 Mark d chip and 17# injectors netted me 1-2 mpg as the engine is running closer to optimum than stock with more low end power.

My stroker m20gets 2-3mpg better than the more stock car because it makes more torque so I short shift and can pull in 5th rather than downshift. Plus I drive the cars hard so it doesn't phase this engine as much to keep a higher pace. Probably explains why I got worse gas mileage in a 4 cyl 114hp Volvo (rated 28 highway) 17 vs 23 average.

This video explains it:

http://www.youtube.com/watch?v=Tpc0vjAx2gs&feature=youtube_gdata_player

[gtarwiz]

bikes run on fat and save you money.
cars run on money and make you fat.