Normally the stations I fill up my Ranger at have 10% ethanol, ive been using Stabil Marine 360 at 1 ounce per 10 gallons as instructed on the bottle,coincidentally my truck takes 10 gallons every time I fill it up. While it hasnt increased my mpg, I'll continue to use it if it helps against the negative effects of ethanol. I average between 20.8-21.2 mpg with the 3.0 Vulcan. I was also considering using Lucas Safeguard ethanol treatment, but the general consensus on here is that all Lucas products are junk, correct me if im wrong. Id also like to give 2 stroke oil a try, would TCW3 be the best to use? Ive heard of it leaving ash deposits on valves. Whatever I decide to use, is it ok to use it every fill up? Thanks guys. For the next 6 months I'll be driving it 300 miles a week, all highway miles at speeds of 45-70 mph.