Busted/Confirmed Mods:
Acetone:
I say it's busted (I tried it once, but FE went down due to weather)
http://www.fuelsaving.info/acetone.htm
http://www3.telus.net/metro/log/nov0305.htm
http://www3.telus.net/metro/log/nov1805.htm
Aerodynamic Mods (general):
Confirmed
http://www.kenworth.com/brochures/FuelEfficiency.pdf
Air-Bleed Devices:
Busted (Bad for pollution though and illegal in most areas)
http://www.fuelsaving.info/air_bleed.htm
Alternator/Accessory (AC, Power Steering, etc.) Belt Removal:
Confirmed
http://www.gassavers.org/showthread.php?t=1074
Boattail:
Confirmed
http://www.greencarcongress.com/2005...at_tail_d.html
http://www.maxmpg.org/the_cap.html
http://www.nasa.gov/centers/dryden/p...ain_H-2283.pdf
http://www.osti.gov/fcvt/2000-01-2209.pdf
Caulking:
Really hard to test - how would you A-B-A it? (Hmmm...Scotchtape? Might be crazy enough to work! Thanks zpiloto!)
Driving Technique:
Confirmed...over and over and over
Electrical Mods (grounding/stabilising):
Plausible?
http://www.fuelsaving.info/electric.htm
Ethos:
Busted
http://www.gassavers.org/showthread.php?t=908&page=2
http://www.gassavers.org/garage.php?do=viewgaslog&id=28
http://www.fuelsaving.info/ethos.htm
Front Wheel Skirts:
TBT (to be tested) (IMO most aero mods work)
Fuel Catalysts:
Busted
http://www.fuelsaving.info/catalysts.htm
Grill block:
confirmed
http://www.metrompg.com/posts/grille...ing-part-1.htm
http://www.metrompg.com/posts/grille...ing-part-2.htm
Hydrogen Generators/Injectors:
Plausible? (good theory, but impractical?)
http://www.fuelsaving.info/hydrogen.htm
Ignition Enhancers:
http://www.fuelsaving.info/ignition.htm
Intake/Exhaust Mods:
TBT
Increased PSI:
Confirmed (need a link)
K&N/High Flow Air Filters:
busted
http://www.metrompg.com/posts/air-filter-part-1.htm
http://www.metrompg.com/posts/air-filter-part-2.htm
Lightweight oils:
TBT
LPT (Light Pressure Turbo):
Confirmed
http://www.autozine.org/technical_sc...h_engine_3.htm
http://en.wikipedia.org/wiki/Turbocharger
http://autospeed.drive.com.au/cms/A_2664/article.html
LRR (Low Rolling Resistance) Tires:
Confirmed
http://www.greenseal.org/resources/r...resistance.pdf
Magnets:
Busted
http://www.fuelsaving.info/magnets.htm
http://www.kirotv.com/consumer/2220354/detail.html
Mirror removal:
TBT (monitor system electrical load may outweigh benefits IMO)
Oil Additives (Slick50, Duralube, etc.):
Busted
http://www.fuelsaving.info/oil.htm
http://www.carbibles.com/additives.html
Platinum Injection:
Busted
http://www.fuelsaving.info/platinum.htm
http://www.cbc.ca/consumers/market/f...pvi/index.html
PCV Catchcan:
TBT
Rear Wheel Skirts:
Confirmed
http://www.metrompg.com/posts/grille...ing-part-2.htm
Tire Pressure (increased):
Confirmed
http://www.gassavers.org/showthread....highlight=tire
Undertray:
Confirmed (need a link)
Vortex Generators:
Busted
http://www.fuelsaving.info/turbulence.htm
http://www.kirotv.com/consumer/2220354/detail.html
WAI (warm-air-intake):
Jury is out - may be vehicle dependent or mostly improve winter FE
http://www.metrompg.com/posts/wai-test.htm
I'll think of more, but please add whatever you feel like or mods you would like to see busted/confirmed.
Also, I saw an older Mythbusters last night that I hadn't seen before. They tested AC on vs windows open FE. I think their testing methods left a lot to be desired and they should have run it more than once, plus they only tested at 45 mph due to safety conditions on the track. Windows open won by traveling an extra 30 miles on 5 gallons of gas. It's a large enough margin that I'm certain it would be fairly consistent, but I'd like to see the same test at higher speeds (and swapping methods per vehicle, and repeatability, etc).
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Linear Mode
