So less 25% in gas price up front but 30-40% worse mileage?whats the point?
exactly. It actually costs more in the end because of how much more is required to get you around.
I certainly understand,and would use it myself if it the end result saved me money however in this case it costs more per mile than gasoline so at the end of the day you have less money in your pocket.
My hemi for example. I couldn't get an more than 15mpg with regular fuel in the tank but premium(100% gasoline)consistently got me 20 or more mpg. My commute is 30 miles each way on the flatest roads you ever drove and I track every tanks mileage. I very rarely do any city driving in it.
Anyways it cost 10 cents a litre so roughly 40 cents a gallon more which is roughly 10% more per fill up to get 25% better mileage. So in my case the added expense pays off.
If I did nothing but nothing but city miles my mileage dips to 10-12 mpg and never really changed no matter which grade fuel was in it,so the added expense nets no reward so there would really be no point in my case to use premium if all my miles we city miles and I'd just use regular.
Getting 6000 pounds moving is much more difficult than keeping it moving.
So if that is also the case in the op's situation then I understand using e85 however in this case I'd track a few tanks to be sure.
Are we talking about an 02 silverado?
We're they even flex fuel equipped then? If they aren't then there would be absolutely no benefit using it. The ecu will not ad timing nor compensate with enough fuel and there is potentially a risk of engine damage because the ecu will not recognize it being an oxygenated fuel and tuning won't be accurate for that high alcohol content.
If it is a flex fuel vehicle then rock on.
Put tc-w3 in with fuel.