oldnavy wrote:
JPFreek1 wrote:
This is an interesting topic, especially since we wrote a story on the future of fuel and the use of biofuels in our Aug/Sept issue of JPFreek. You can check out the O+WP, a biofuels education project, in the issue at:
http://www.jpfreek.com/Images/JPF-No3.PDFSo, do any of you actually use E85 or biofuels? I'm curious about its use and how it performs compared to regular petrol and diesel with Jeep owners.
I had a friend using E85 for a while, but quit using it because it was only 20% cheaper then regular gas and his mpg drop was almost 35% in his FFV Chevy PU truck.
All the B100 diesel users I know report at most about 5% drop in mpg when running it in VW TDI's.
WVO Does not cause lower MPG in my Jetta TDI or CRD, A good Cetane booster from Walmart seems to compensate for this b100 powerloss here at 6,200 feet above sea level. The manufacturing process actually takes out some of the extra lubricity that WVO has. Too much water in the mix to remove large particles I think is the key, extra water speeds up the process. I have made biodiesel in my garage and you have to spray water in it to cause the Lye to catch large particles sink to be drained off as waste. Just a guess that this process takes away from the lubricity qualities of WVO where you have almost 90% less heat than Petrol diesel, I havent seen much on the heat rating from biodiesel compared to WVO, but I bet WVO is a lot less heat, it is thicker and harder to use in cold temps, but a good kit takes care of that by heating it up using the engine coolant.
I have never seen a change in MPG with my TDI Jetta using the WVO veggie kit, I typically averaged 48-51 highway and 45 city on veggie. I Never got less than 37mpg that I can remember. I Actually got better performance on WVO in the higher RPMs, of course it could be related to my upgraded stage 3 injectors with 2X larger holes. I did notice alot less smoke, so when on petrol diesel I could gun it in first from the light in the jetta I would almost completely cover the guy behind me in a black cloud and my trunk and rear license plate was always covered in black soot from in town driving, but with veggie almost no smoke comes out even when pushing the performance module to its limits. I was using Chip mod and a module with larger injectors, exhaust, and intake. So WVO is free junk from the frying pan at restraunts, so does it matter if you lose a bit? Hundreds of gallons free for the taking.
I have used filtered WVO (from a Chinese restraunt) in my CRD with out a kit and no problems and its hard to see if smoke is coming out while driving I couldnt say if that's different but it does smell different. but I can say that using WVO at highway speeds in Colorado of 75mph, so going 80+ the engine is quieter and seems to have more torque when passing using the overdrive, if you push down to far it drops to 5th gear and its hard to tell anything different going 85 and 3,000rpms.
From a biodiesel station I seem to get worse gas mileage, but not by much, maybe 1mpg at most going highway speeds with no noticeable power change just a slight decrease in mileage offset by cetane booster, still softer engine noise.
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