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Personal best on your latest fill-up? Post it here! Members who have recently recorded personal best fuel economy share their results and how they accomplished them. By MetroMPG - 90 replies In forum: Success Stories

Automotive Aerodynamics (video series) Forum member and aero researcher graysgarage is producing info-rich, YouTube videos on a variety of automotive aerodynamic topics. They include clear explanations, plus lots of flow test footage and analysis. And he's taking suggestions for future episodes. By graysgarage - 67 replies In forum: Aerodynamics

2nd gen Honda Insight parallel portable plugin hybrid battery pack build thread RedDevil is adding a 2nd battery pack in parallel with the OEM hybrid battery pack for additional capacity and a boost in mpg. By RedDevil - 73 replies In forum: Hybrids

The Zing! (Custom-built prototype hybrid tadpole trike) The intention is for the production version is to have a 7.2kWh lithium pack which will have a maximum electric-only range of ~70 miles or about 40 miles in everyday driving. Then the generator starts up and you can keep driving, similar to the Chevy Volt. By NeilBlanchard - 177 replies In forum: Hybrids

Orange4boy's Rescue and Revival of a 2003 Prius See how Orange4boy brings back his 2003 Prius from the dead with a "dreaded P3120 HV Transaxle failure code". By orange4boy - 167 replies In forum: Hybrids

Pre-heating the Prius Transaxle and Engine for better fuel economy Orange4boy experiments with pre-heating things on his 1st gen Prius. By orange4boy - 70 replies In forum: Hybrids

OG's VX Build: HyperMile Driving with some JDM Styling Member OG VX documents the ongoing restoration/ecomodding of his 1992 Honda Civic VX with tons of details and photos. Already averaging 54 mpg (US). By OG VX - 471 replies In forum: EcoModding Central

Front Air Dam ABA test results: 7.49% increase in MPG at 60 mph (2003 Honda Civic DX) The addition of lawn edging air dam to this 2003 Civic DX shows very good results in testing: mileage jumps from 44.7 to 48 mpg in multiple 60 mph comparison runs. The downside: it scrapes a lot in normal driving. (Just like the very deep factory air dam on the Chevrolet Volt.) By whatmaycome14 - 47 replies In forum: Aerodynamics

Testing rolling resistance of the Various Tires of the Suzukiclone Fleet (RE92 wins) By MetroMPG - 50 replies In forum: EcoModding Central

Spotted: fully streamlined/aeromodded ~2005 Honda Civic sedan (Austin, TX) Spotted in the wild in Austin, Texas: a 2005-ish Civic Sedan with the full DIY aero treatment, from custom front bumper, to wheel covers, skirting, Kammback treatment and more. Anybody know whose it is? By MetroMPG - 57 replies In forum: Aerodynamics

Double kilotank: 2,009.6 mi on one 35 gal tank ('07 Dodge Ram 2500 quad cab) Distance: 2,009.6 miles; Fuel used: 35.0 gallons; Actual measured mileage: 57.42 mpg. Diesel_Dave notes the additional modifications & techniques used to accomplish this feat in this thread. By Diesel_Dave - 85 replies In forum: Success Stories

Aeromodded Civic VX 72mpg (image heavy) Ecotex shares with us his father's modified Civic VX that gets very impressive mileage. By ecoTex - 357 replies In forum: EcoModding Central

Freezing the Slushbox. Torque Converter on-demand lockup switch. Forum member orange4boy documents how he took manual control over the automatic transmission in his Toyota Previa van to force the torque converter to lock at will in any gear. (Note: requires an attentive driver to prevent potential damage). This modification gave him the largest increase in fuel economy of all his mods to date. By orange4boy - 269 replies In forum: EcoModding Central

Boat tail - Redneck style... Redneck builds a boat tail for his Geo Metro out of EMT tubing, skinned in 1/2 inch thick foam insulation board. Initial results show a ~15% improvement in real world highway MPG. By redneck - 172 replies In forum: Aerodynamics

City ecodriving comparison: 2014 Mirage CVT vs. Mirage 5-speed vs. 1998 Metro 5-speed Econobox fuel-sipping shootout, new vs. old school: MetroMPG was curious about the fuel economy potential of the 3-cylinder 2014 Mitsubishi Mirage. So he pitted a 5-speed manual Mirage against a Mirage CVT against his modified 1998 Geo Metro (Firefly) manual in a city MPG comparison. By MetroMPG - 91 replies In forum: Hypermiling / EcoDriver's Ed

Ren: My '92 Civic Following on the heels of the aesthetically entertaining, aero-modified Project Anal Probe (1992 Ford Probe), Sven7 is well underway in the transformation of his latest steed into an even more efficient and unique looking machine. By Sven7 - 392 replies In forum: EcoModding Central

89 civic wagovan 5spd (very slow build: power + ecomods & lots of pics!) Meet "Skiddy", a 1989 Honda Civic Wagon being transformed into a "dual purpose" sleeper: 300 horses PLUS a pile of efficiency mods. The goal is 35 MPG (US) combined (compared to the original EPA rating of 28 MPG combined). By vrmouseyd15b - 298 replies In forum: EcoModding Central

4 does-for-more-bros (97 civic dx sedan: HX + auto to manual swap) Jakins wanted more doors and A/C, so he picked up a cheap 4-door Civic DX automatic and is converting it over to HX mechanicals and manual transmission, plus aero mods. His goal: 55-60 mpg US. By Jakins - 64 replies In forum: EcoModding Central

DIY open source lithium BMS (battery management system) This thread details the development and testing of a lithium battery management system (BMS). The system is being built for a Toyota Prius plug-in conversion kit, but it could be used in many other applications. By Daox - 42 replies In forum: Fossil Fuel Free

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. By Concrete - 318 replies In forum: Aerodynamics