crashz
Elite Member
I bought a new Silverado last year (2500HD, 6.0L gas, 6 speed auto, 4x4, ECSB) that has the option for running flex fuel. In my area, its difficult to find, so I have used regular gas, well E10, since new. Recently a few stations opened up E85 pumps (Mass Turnpike rest areas at Sturbridge) that I frequently pass. So tonight, I pulled off and filled up with E85 just to try it out.
First off, I had a little over 1/4 of a tank of regular gas (E10). I filled up with 22.75 gallons of E85. That makes a mixture of about 58% ethynol and 42% gas, or E58.
I pulled back onto the highway and continued my journey how for another 60 miles or so. What I have noticed is that in general, there is very little difference in performance. The truck has the same power, but I do notice that I need to step on the accelerator more from a stop than normal. Which contradicts its highway behavior because I felt I needed less pedal pressure on the hills than normal. There was no bucking or snorting or anything that indicated that the truck is adjusting to a new fuel.
A big difference is the sound. The truck is noticably quieter at idle and in low speed driving. I also do not hear the regular LS motor injector tick, which is usually very prevelant in this truck.
So far I've only got ~60 miles on this tank. I know I'll lose some mileage with this fuel, but I did some "spirited" driving to test the limits, so I expect miserable mileage. I'll update this thread as I burn through the fuel, but so far I'm pleased.
First off, I had a little over 1/4 of a tank of regular gas (E10). I filled up with 22.75 gallons of E85. That makes a mixture of about 58% ethynol and 42% gas, or E58.
I pulled back onto the highway and continued my journey how for another 60 miles or so. What I have noticed is that in general, there is very little difference in performance. The truck has the same power, but I do notice that I need to step on the accelerator more from a stop than normal. Which contradicts its highway behavior because I felt I needed less pedal pressure on the hills than normal. There was no bucking or snorting or anything that indicated that the truck is adjusting to a new fuel.
A big difference is the sound. The truck is noticably quieter at idle and in low speed driving. I also do not hear the regular LS motor injector tick, which is usually very prevelant in this truck.
So far I've only got ~60 miles on this tank. I know I'll lose some mileage with this fuel, but I did some "spirited" driving to test the limits, so I expect miserable mileage. I'll update this thread as I burn through the fuel, but so far I'm pleased.
