Quote: We are using M5 in our Outlaw car. Yes you use more fuel but we started with M5 and have no basis for comparison. We use electronic fuel injection/BS3 on the hemi. The extra power is a plus but besides that it also has lube already in it and it really doesn't cost much more than M1. It is nasty to the eyes...FOR SURE.
Any chance it has a touch of nitro?
It has nitro paraffins and will fail a fuel check if they are checking for nitro.
