Top Vehicles MPG (US)
Gasoline cars, last 90 days...
1.1988 honda civic 4dr DX71.64
2.1998 Honda Civic DX Coupe66.11
3.1992 Honda Civic CX65.44
4.1997 Honda Civic CX/HX63.77
5.1994 Geo Metro 63.55
6.2009 Honda Fit Sport62.41
7.1993 Geo Metro G1061.6
8.1993 Ford Festiva L61.22
9.1991 Honda CRX HF61.07
10.1991 Honda CRX HF <><61.06
More top-10 MPG lists:
hybrids, diesels, trucks, motorcycles & more
 
Highest MPG for a non-hybrid: Mitsubishi Mirage
Best non-hybrid MPG: 2014 Mitsubishi Mirage?
Mitsubishi says its new Mirage subcompact will get the best MPG of any non-hybrid: 44 mpg (US) highway, 37 city. (Some drivers are already beating that in various economy driving contests.) How? An efficient 1.2L, 3-cylinder engine, very light weight and aerodynamic design.
 
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What is Ecomodding?
Welcome to EcoModder.com, an automotive community where performance is judged by fuel economy rather than power and speed. EcoModders employ a combination of vehicle mods, driving techniques, and common sense to squeeze every penny out of the pumps. Reasons for becoming a member range from the economical to the ecological. More info about where EcoModding came from.
 
Top picks from the EcoModder forum and blog

You know you You know you're an ecomodder if...

One of the more popular threads on EcoModder, this is a lighthearted and tongue-in-cheek look at the many potential signs and symptoms that you may be more interested in fuel economy than the average person...

Started by Tango Charlie in forum: The Lounge - 1569 replies

Speed vs. MPG charts (post 'em if you got 'em)

The speed at which you choose to drive has the biggest impact on your highway fuel consumption. This fact is nicely demonstrated by this collection of graphs showing the relationship of MPH to MPG in a variety of vehicles, from a 55 hp Geo Metro to a 505 hp Corvette, and many others in between.

Started by bluejoey in forum: Hypermiling / EcoDriver's Ed - 95 replies
Speed vs. MPG charts (post

Electric Clutch Power Steering Electric Clutch Power Steering

4ringcircus describes the project: "I have added an electric clutch to the hydraulic power steering and now can switch it on and off with the push of a button! My truck is a '97 Ford Ranger extended cab, 4x4 with the 4.0 OHV engine and manual 5 speed transmission." The results? 1 - 1.5 more MPG.

Started by 4ringcircus in forum: DIY / How-to - 36 replies

Buy a trailer (instead of a pickup truck)

This is a thread for anyone thinking about getting a pickup truck as a first or second vehicle when adding a trailer to your car would do instead (and save you lots of fuel & money).

Started by oil pan 4 in forum: General Efficiency Discussion - 178 replies
Buy a trailer (instead of a pickup truck)

CarBEN EV5 Full Sized Prototype Construction - 5 Seat Electric Car From Scratch CarBEN EV5 Full Sized Prototype Construction - 5 Seat Electric Car From Scratch

NeilBlanchard has begun the construction process to build the full-sized prototype of his aerodynamic 5-passenger electric car he's nicknamed "CarBEN EV5". The prototype is being assembled with rigid foam sheets cut on a CNC machine.

Started by NeilBlanchard in forum: DIY / How-to - 420 replies

Project: Aero Trailer for TDi

VRdublove writes: "We have a 8000 mile summer tour, and decided to make an aerodynamic trailer to carry our ultralight adventure vehicles. We decided to use a utility trailer as the base, and add an aluminum shell that tapers the bodyshape of the Sportwagen that's pulling it."

Started by VRdublove in forum: Aerodynamics - 13 replies
Project: Aero Trailer for TDi

Project - Extended Pop-Top Aerodynamic Camper Shell ( Project - Extended Pop-Top Aerodynamic Camper Shell ('99 Tacoma)

The design criteria for this fiberglass-over-foam project: extended to the end of the lowered tailgate for maximum room (and further reduced aero wake); enough room in the "up" position for a raised floor to store gear beneath while still having room to sit up and move around comfortably; simple and convenient to use.

Started by a8ksh4 in forum: Aerodynamics - 315 replies

Full-boat-tail trailer with gap-fillers for Toyota T-100 pickup

Phil says: "The boat hull is far from ideal but using it will save hundreds of man-hours. Maybe 40 mpg HWY... we'll see. P.S. the trailer is large enough to serve as a rigid tent, for car-camping."

Started by aerohead in forum: Aerodynamics - 306 replies
Full-boat-tail trailer with gap-fillers for Toyota T-100 pickup

Idea on Auto Adjusting Grill Block Idea on Auto Adjusting Grill Block

Shortie771 has designed an automated variable grill block that uses air pressure against a counterweight to actuate the shutters, rather than electronics or a manual cable actuated approach (two other common methods).

Started by Shortie771 in forum: Aerodynamics - 59 replies

BMW e36 318 tds - modding thread

Here's an interesting project: the award for worst drag coefficient in the e36 BMW 3-series range went to the 3-door hatchback. But AndrzejM likes the utility of the diesel BM hatch, so he's addressing the drag problem with the testing (see Kammback tuft testing video on YouTube) and construction of various other mods.

Started by AndrzejM in forum: EcoModding Central - 141 replies
BMW e36 318 tds - modding thread

1997 Civic CX to HX engine/VX trans swap! 63 MPG @ 62 MPH 1997 Civic CX to HX engine/VX trans swap! 63 MPG @ 62 MPH

When his 1997 Civic CX engine needed a lot of work, turbovr41991 decided to spend his repair time doing something different: he picked up a rusty Civic HX and swapped over the more efficient lean burn engine instead, and went with the more efficient gearing of the Civic VX. With a few other modifications in place, the car is returning seriously impressive highway fuel economy.

Started by turbovr41991 in forum: EcoModding Central - 148 replies

Project 100 (custom enclosed Honda C90 targets 100 mph vmax and 100 km/L FE)

Forum member visionary is custom-building an enclosed motorcycle with the goal of achieving 100+ mpg at its cruising speed of 70 mph, from an engine displacement of 100 cc.

Started by visionary in forum: Motorcycles / Scooters - 290 replies
Project 100 (custom enclosed Honda C90 targets 100 mph vmax and 100 km/L FE)

MetroMPG MetroMPG's Honda Insight boat tail extension (cardboard) tuft video; ABA test +9.7%

MetroMPG used CAD (Cardboard Aided Design) to make a 'temporary' aero tail for his Insight. The project thread includes a video of tuft testing the completed tail, and an A-B-A test that showed a 9.7% improvement in fuel economy at 80 km/h (50 mph). At that speed, on a level road, the car can now achieve 110+ mpg (US).

Started by MetroMPG in forum: Aerodynamics - 201 replies

Arduino controlled automatically actuated grill block

Here's the idea: Use an arduino to monitor temperature and output commands to a simple electric door lock actuator. This actuator will close and open the grill block door. Originally started back in 2009, this project sputtered out when the first design didn't work well. The 2012 redesign looks much better.

Started by Daox in forum: Aerodynamics - 163 replies
Arduino controlled automatically actuated grill block

What is it?  (Spotted: rear engine TDI, custom aero body) What is it? (Spotted: rear engine TDI, custom aero body)

Member rjacob spotted this custom bodied mystery eco-car on the road in Rochester, NY. It's got a TDI badge on the rear, and that's apparently where the engine resides as well.

Started by rjacob in forum: EcoModding Central - 94 replies

Have you ever given 1-on-1 ecodriving instruction? (Here's how I did it.)

MetroMPG walks us through his recent experience of teaching individual "non-hypermilers" about ecodriving. With just an hour-long session, each driver's results showed an immediate increase in fuel economy above their car's EPA ratings.

Started by MetroMPG in forum: Hypermiling / EcoDriver's Ed - 80 replies
Have you ever given 1-on-1 ecodriving instruction? (Here

Experiment: smooth wheel discs tested A-B-A - 4.6% mpg improvement @ 65 mph Experiment: smooth wheel discs tested A-B-A - 4.6% mpg improvement @ 65 mph

Forum member Concrete tested smooth wheel covers on his 2000 Chevrolet S10 pick-up, and posted the data compared to the stock alloy wheels. A-B-A testing found +1.3 mpg -- that's about 4-5% depending on how you want to figure it.

Started by Concrete in forum: Aerodynamics - 312 replies

Project: ECOfamily Civic and its Aero Hitch Box

Christofoo says: "This thread will be about my forthcoming hitch-mounted cargo box boat-tail ... maybe the first project thread applicable to a sedan."

Started by christofoo in forum: Aerodynamics - 132 replies
Project: ECOfamily Civic and its Aero Hitch Box

Dam, It works! (Air dam on Smart Fortwo: 3-4% MPG improvement) Dam, It works! (Air dam on Smart Fortwo: 3-4% MPG improvement)

In addition to a clear lower grille block and smooth, black wheel covers, Chumly added and tested a simple air dam: "I just made an air dam out of some lawn edging. A-B-A testing shows 3.16% - 4.2% (avg 3.73%) better mileage. It took a whole half hour to make and install it, I should have done this a long time ago!"

Started by chumly in forum: Success Stories - 29 replies

Echo-Troll Modding Thread (2005 Toyota Echo)

Follow the progress of an extensive aeromodding project on a 2005 Toyota Echo 1.5L , 5-speed. EPA : 30 City \ 38 HWY \ 33 Combined MPG (US). Modified MPG: 60 to 75 MPG in a 4.3 mile commute \ 60 to 67 mpg on the highway.

Started by echo-francis in forum: EcoModding Central - 205 replies
Echo-Troll Modding Thread (2005 Toyota Echo)


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