I couldn't get gas/glow to idle well in my ST40 unless I used 60 to 65% methanol. With less than 30% methanol any amount of Nitro would make it detonate loudly on acceleration. Even with 60% methanol and 10% Nitro it didn't idle all that great so I started trying the E85. It's not perfect either but close enough to use and considerably cheaper than glow.

On the fuel mix issue, Stoich for gas is 14.7:1, ethanol 9:1, methanol 6.42:1, and E85 9.77:1. The E85 consumption rate would be higher than gas/glow but not as much as it would appear. The difference between Gasoline and E85 is more like 30% on paper but I have seen cases where street vehicles would get virtually identical mileage on either. Strange things can happen in a combustion chamber that don't show up on paper. My ST40 used a lot less fuel on gas/glow than straight glow but when I switched to E85 it used only slightly more than gas/glow. I know every engine is different but that is what mine is doing.

Tom I must have posted at the same time as you. I went to a Type F four stroke plug and got my extended idle and transition back. I also have friends that say the same as your friend with the F150.