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Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L The Micra's official ratings are almost the same for the automatic and manual transmission. Yet the 5-speed can be much more efficient in the real world using just one simple ecodriving technique. Again we see the EPA handicaps manual transmission cars due to dictated, non-eco shift points during testing. By MetroMPG - 78 replies In forum: Hypermiling / EcoDriver's Ed

3rd gen Prius aeromod thread Vman455 buys a 3rd gen Prius, and in typical ecomodder fashion doesn't take long to start modding it. Check out what he has done. By Vman455 - 298 replies In forum: Aerodynamics

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. By a8ksh4 - 345 replies In forum: Aerodynamics

Review: driving a $9998 2015 Nissan Micra (Nissan's most efficient manual in Can/US.) MetroMPG gets a Nissan Micra to review for a week. By MetroMPG - 84 replies In forum: General Efficiency Discussion

Another truck aero cap idea... Follow the evolution of BamZipPow's aerodynamic cap for his 1998 Toyota T-100 pickup. By BamZipPow - 392 replies In forum: Aerodynamics

Experiment: coast down distances (rolling resistance) @ various tire pressures Increased air pressure reduces a tire's rolling resistance - but is more pressure always better? Coast-down distances are measured for three different kinds of tires, with pressures ranging from 20 through 70 psi. By MetroMPG - 116 replies In forum: EcoModding Central

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. By MetroMPG - 112 replies In forum: Hypermiling / EcoDriver's Ed

The AX Eco Project : 100 mpg target ! In the 90's, the super light Citroën AX diesel held a Guinness record as the most efficient production car available, capable of 65 mpg (US) at 56 mph (90 km/h). HypermilerAX's modifications have already improved this to 80 mpg (US) at 56 mph. Now he's aiming for 90 mpg to beat the 1994 "AX Eco" concept car, and is also eyeing a 100 mpg tank (2000 km). By HypermilerAX - 131 replies In forum: EcoModding Central

Taller Tire Test (5.7% MPG increase observed on Honda CR-Z @ 55-65 MPH) The purpose of the test was to determine whether larger diameter tires, which result in lower engine RPM and higher load for a given speed, can improve gas mileage. The test car has a 6-speed manual transmission. At highway speeds (55-65 MPH), the larger tires gave a 5.7% average increase in MPG. The engine ran about 200 RPM lower. By SecondWind - 72 replies In forum: EcoModding Central

Lean burn Honda Civic sedan: 93 Civic d15z1 swap into LX 4 door (VLX) 4-door efficiency: slownugly is buttoning up this project where he took the lean burn engine from the iconic Civic VX and swapped it into a sedan body. "Goals: 50 MPG average while maintaining stock appearance. It will be the economy sedan Honda never made in this generation." By slownugly - 182 replies In forum: EcoModding Central

Automatically actuated grill block - Mk3 Daox designs an automatically actuated grill shutter. The design is nearly fully 3d printed and controlled via an arduino. By Daox - 139 replies In forum: Aerodynamics

Tall tire test (taller gearing advantage offset by wider, heavier wheels/tires?) Taller tires mean reduced cruising RPM, which is good for fuel economy. But what if the taller wheels/tires are also wider (which increases aero drag) and heavier? SentraSE-R tested his Scion Xb to find the answer. By SentraSE-R - 97 replies In forum: EcoModding Central

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. By visionary - 385 replies In forum: Motorcycles / Scooters

PICS! Econo Car conversion to Kubota Diesel. 1997 Geo Metro, Kubota D1005 3 cylinder Planejob is making great progress on dieselizing his Metro. His goal: "I want something that seats 3, sounds like a tractor, gets great mileage, and looks insane (aero mods)." No doubt that's going to happen. By planejob - 238 replies In forum: EcoModding Central

How to Winterize Your Car EcoModder Style Check out our list of things to do to winterize your car. Add your own info and thoughts too! By Daox - 45 replies In forum: EcoModding Central

SuperGeek Pictures, what do you all think? Check out this cool custom motorcycle reverse trike project. Hes getting over 70 mpg! By Alien Vehicles - 60 replies In forum: EcoModding Central

Honda Insight Under-body Smoothing Panels (custom belly pan / undertray) This is an incredibly detailed effort to smooth out the underside of a first generation Honda Insight. After the modification, the owner says, "As for MPG, I seem to be getting about 7 MPG more than before. Average is about 81 MPG with 60 F temps, and this is over a full tank of gas." By 3-Wheeler - 81 replies In forum: Aerodynamics

15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed A collection of mosty small & inexpensive mods, from aerodynamic to electrical to gearing changes (through oversize tires) result in an average 15% mileage improvement in a 2007 Civic. By MetroMPG - 47 replies In forum: EcoModding Central

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!" By chumly - 50 replies In forum: Success Stories

208 km (129 mi.) in EV mode with a 2007 prius plugin 20kWh Planetaire shares his very nice 2nd gen Prius PHEV conversion. By planetaire - 33 replies In forum: Hybrids