In the days leading up to the 12 hours of Sebring earlier this month, General Motors, the Corvette Racing Team, and EPIC, the Ethanol Promotion and Information Council, all joined together to hold a media event at Sebring International Raceway, about three hours north of Miami.
The event was to hype the use of E85 Ethanol racing fuel as an official fuel the American LeMans Series, and specifically in the GM Corvette Racing team. The result was successful as the GM Corvette Racing team came in first in class (GT1), and second overall. (Clarification: the Corvette Racing Team is campaigned by Pratt and Miller Racing for General Motors.
Cellulosic Ethanol is the flavor of the week and at 105-octane, it is the highest octane rating for fuel on the road today. Made with a blend of 85% ethanol and 15% gasoline, it is refined not from corn, but from wood waste, switchgrass and citrus by-products. Differing from vegetable-waste-derived ethanol, which takes approximately three gallons of water to yield one gallon of ethanol, cellulosic ethanol takes between 2 and 2.5 gallons of water to produce one gallon of E85. For comparison, it takes three gallons of water to get one gallon of straight gas.
The GM Corvette Racing teams efforts were fueled by enough cellulosic ethanol to drive over 1200 miles in day and nighttime closed-course racing conditions. It’s ironic because the good folks at General Motors arranged to drop off an extremely well equipped Tahoe LTZ for us to make the trip from West Palm Beach to the famed racecourse.
The trouble was that there are no pumps within a 50-mile radius that dispense any type of ethanol — an interesting statement on the current state of ethanol availability. Thank goodness for the FlexFuel-equipped Tahoe — we made the trip with a tank full of regular unleaded-based gasoline.
But to add salt into the wound, it probably would have been a better idea to take off all the promotional stickers trumpeting the virtues of ethanol over gasoline. Every time we stopped, people gathered around to discuss the plusses and minuses of ethanol. And then they reacted with scrunched brows when we told them the Tahoe was quenching its thirst with gallons and gallons of gasoline.
Oh well, maybe in a few more years, once the energy suppliers figure out how to make ethanol cheaper, will we see more ethanol pumps nationwide.
But we can all admire the GM Corvette Racing GT1 car as it enters turn one at central Florida’s oldest racecourse.
Words and photos by Mark Elias



03/24, 10:27 AM
posted by:
davebo
I don’t care if it runs on dead babies, I want that C6R please.
03/24, 11:25 AM
posted by:
hateful83
I just read an article in motortend about how GM hooked up with a company that makes E85. It’s a crazy nontraditional way too. I have to read it again to get a full understanding. At any rate, E85 should be plentiful in the near future.
03/24, 11:30 AM
posted by:
Htay9500
I guess we’ll be getting more food off the table and raising our food supply correct?
03/24, 1:57 PM
posted by:
SS4LIFE
i read something like that too hateful83. Although from what I understood and read it sounded like the domestics, I heard Ford was doing this too, is that GM and Ford are going to be “taking measures to increase the availability of E85″ I don’t know if that means that the Domestics are going to invest in gas stations or try and offer incentives to gas companies or gas station owners.
Heck I have an easy solution to that. With the number of GM brand dealerships and Ford dealerships that I drive by everyday I say just have the dealerships offer E85 pumps. They can put them right next to the Suburbans, Tahoes, Silverados, and Avalanches we all know that they’ll be needing them.
03/24, 2:22 PM
posted by:
The359
The Corvette C6.Rs actually did not run Sebring on E85. Pratt & Miller found that the E85 was eating through the seals on their custom-built fuel cells, and so they announced that they’d delay their use of E85 until they could correct the problem.
Intersport Racing’s Lola-AER, B-K Motorsport’s Lola-Mazda, and Drayson-Barwell’s Aston Martin DBRS9 did all run E85, however.
03/24, 2:34 PM
posted by:
A True Gear Head
Ethanol sucks. Its raising the price of our food ( corn syrup ), on top of that it pollutes more than gasoline. What would make more sense is to get methane from our trash.
03/24, 2:40 PM
posted by:
SS4LIFE
Because Ethanol has a much higher combustion rate and therefore burns better and provides superior performance to regular gasoline and diesel. Thus the 105 octane levels mentioned in the article above,. Cars that run on ethanol and also get more horsepower and are slightly quicker, plus it’s supposed to cost less then gasoline and definitely less then diesel. Fuel that is more renewable, cheaper, and better performing. Makes sense to me.
03/24, 4:13 PM
posted by:
C6Racer
PRODRIVE SUCKS! C6-R RULES!
davebo, Pratt&Miller used to sell street versions of the C5-R for about $450K. I’m not sure if they still do that, tho.
03/24, 6:31 PM
posted by:
F3INT))AP3X
I saw the Corvette shown in this article running at the ALMS at Laguna Seca a little while back, and the sound coming out of that monster was enough to make you want to run back inside like a little girl. If you will notice the 3 green lights (1 lit, 2 unlit) built into the passenger door, they are for 1st, 2nd, and 3rd place and they update constantly depending on the racer’s position. The light system allows the ALMS to run all 4 classes (GT1, GT2, LMP1, LMP2) at the same time on the track! And one of my most vivid memories of the day was when a whole squad of LMP2 cars maybe 5 or 6 flew by with this GT1 Vette right in the middle of them; and although deafening, I could hear the Vette screaming louder than all of them, truly badass.
03/24, 11:57 PM
posted by:
GMBiofuelsGuy
I work in Biofuels at GM and what hateful83 and SS4LIFE are referring to is a partnership between GM and a company called Coskata out of Warrenville, IL. Their three-step process for making cellulosic ethanol lets them use any carbon-containing source — even old tires — to make ethanol. They have some anarobic microbes (bugs) that eat the synthesis gas created by gassifying the feedstock – agricultural waste, landfill waste… almost anything — and excrete only ethanol and a little water. You can read more on their website at coskata.com. Oh, and on SS4LIFE’s comment about selling e85 at dealerships, the first one in the country opens late this week near DFW Airport in Grapevine, Texas. It is an offshoot of Classic Chevrolet, which sold more GM trucks than any other dealer in 2007. They say their customers are up for it and there are a lot of fleets in the area that can use it, too.
03/25, 3:19 AM
posted by:
The359
There was no street version of the C5.R for sale. There was a “street version” of the C5-R built, to meet homologation requirements, but it was just an old test mule redone with C5-R bodywork. Pratt & Miller kept it until 2002, then it ended up in the Corvette Museum. Never sold or even offered to the public.
The C6.R should be louder than LMP2s, it’s a 7.0 liter V8. LMP2s are limited to 3.4 liters; 2.0 liters if they’re turbocharged.
03/25, 3:20 AM
posted by:
The359
Also, I don’t know why this article says the C6.R finished 1st in GT1 and 2nd overall. The C6.R finished 1st in GT1 and 8th overall.
03/25, 9:47 AM
posted by:
melias
To The359:
Just off the phone with Rick Voegelin from GM Motorsports Communications. He said we are both partially correct. The C6.R did have issues with the E85 causing corrosion in the fuel tank (actually involving glues that held parts in place) and as a result ran the race on E10 (10% ethanol). They hope to have the corrosion issues sorted out by the race in St. Petersburg, where they will go back to “pure” (notice the quotes) E85.
As for the #3 cars finishing position, I stand corrected. First in class, eighth overall.
Mark Elias
03/25, 10:36 AM
posted by:
SS4LIFE
Thanks for the info GMBiofuelsGuy! That was crazy because I just thought of it like “Hey that’d be cool if GM did this…” I didn’t think they were actually doing it. Good for them though. I’ve seen a couple gas stations in the Metro Detroit area that actually have signs saying “No Ethanol here”. I think GM as well as Ford and Chrysler do literally need to start having pumps at their own dealerships, if they really want to start increasing the availability of Ethanol. I think for them it’s a win win situation for both the company and its customers.
Hey I have a ? and part suggestion for you. Is GM going to eventually offer Ethanol compatible engines on more of it’s vehicles? Only GM Brand vehicles that are Flexfuel vehicles seem to only be the larger ones. Will this eventually find it’s way being compatible with any of GM’s turbo 4cyl such as the LNF?