Toyota Tundra Forum

Not a true "scientific" study (lol!), but the only substantive difference in fuel that I found was that my ethanol blend gas mileage is slightly worse than my non-blended gas mileage (btw, non-blended gas is getting tough to find in Louisiana and Texas). I saw a slight improvement in the plus grade of gas vs regular gas, but not enough to warrant the price difference. I have not tried premium gas vs regular or plus grades.

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2007 Tundra Limited Double Cab 4x4 Super White
Volant CAI
Pioneer AVIC Z-2 (hard drive upgrade to AVIC Z-3)
Key FOB Tailgate Lock (courtesy of Toxarch)
OEM back-up camera w/flip down monitor microswitch mod
Sirius Satellite Radio
WeatherTech Floor Liners
20" OEM alloy wheels
Line-X Bed liner
UWS Black Powdercoat Low Profile Toolbox
DU-HA underseat storage unit
JC Whitney Black Nerf Bars
Lund Interceptor II Bug Shield
Tekonsha Voyager Brake Controller

Yes ethanol has less energy per unit of measure than pure gas. Same with bio-diesel, something they don't adsvertise.

Ethanol replaces methyl tert-butyl ether as an oxgenator to raise the octane rating of gasoline. MTBE (C5H12O) is manufactured via the chemical reaction of methanol (CH3OH) and isobutylene (C4H8) and has more energy stored than ethanol.

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2007 SR5 Crewmax 5.7L 4x4
Mods: nerf bars, Truxedo tonneau, radar detector power, 3M clear bra, fog lights, black billet grille, rear differential breather, parking sensors, Line-X, power tailgate lock, hood safety latch mod, one off driving lights behind grille, Pioneer NAV w/ OEM camera, Flowmaster 50 SUV dual/dual, blue LED dash lights, Volant CAI, Llumar tint, CompuStar Pro alarm, ProComp 6066 20" wheels, Cooper Zeon LTZ 275/60/20 tires, OME HD coilover lift, Firestone helper air bags, stereo cable lock, Tekonsha P3 brake controller
All mod descriptions and pictures © 2007-2009 by Toxarch. They may be copied only for personal use and the mods may be done for non-profit only.

Yeah, someone told me that supposedly ethanol burns cleaner with less emissions than MTBE, albeit with slight loss in mpg.

Both release carbon dioxide and water when burned. When gasoline leaks from the tanks, the MTBE is water soluble and gets into the ground water. That's the main reason for the move to ethanol.

Makes sense Tox.

On my son's grand cherokee the epa mileage estimate shows 20mpg highway on gasoline and 15 mpg on e85. It has the chrysler 4.7 V8 flex fuel engine. Since you get less mileage you must get less power also or so it would seem!

I avg 20-23mpg doing 60 mph. I got as high as 24.9mpg doing 55mph. on a 300 mile trip. My sticker on the truck has 20mpg on hwy. I have a Crewmax Limited with 5.7.

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AFE Stage II, Borla Pro XS, TRD Shifter, Tundra weather mats, Debadged, Backup camera, HID's, Fire & Ice, Bully Step Bar, Hellwig Anti-Sway Bar, Painted Disc Brakes, Extang Black Max, Herculiner, Deer Strike.

If you drive a reasonable lower speed 55-65 and no mountains or bad headwinds these trucks give real decent mileage, actually better than most full size V6's.

Yeah, but you could either do 55 for 300 miles and make it a 5.5 hour trip, or you could drive 70 and make it a 4.25 hour trip. I'll spend the extra cost and get there early.