Followed thier directons to the letter. Mixed the ist 15 gals. with regular diesel fuel. My performance didn't seem to change, so filled the remaining amount with another 15 gals. Thats when I started having problems with my 2003 GMC Duramax which has 20000 miles on it. Sent E_Mail but no response, Truck would not run so siphoned about 25 gals. out.
Changed my fuel filter, thinned the remaining WVO with about 10gals. of krosene and it barely started. Drove about 100 miles very slowly and put as much reg diesel into the tank that I could. Within 3 miles the truck started to run better. I could not give the engine any extra acceleration before I added the reg diesel and thank God I will never use the [product] again. I think the amount of work and items purchased were far and above what I could recover.
I've sent e-mails and no answers came back. Maybe it,s true, if it sounds too good to be true, it probably is. I consequently lossed about 350.00 in material and new filters and hoses and pumps and all the things to get setup
