Don't mix in more than 10% or even 5% in a non-flex fuel vehicle or the fuel system will be damaged. Forget more than 5% on older vehicles. Even 10% will eventually eat up the fuel system on older vehicles. Check with the alternative fuels forum for more info on Fords. I don't know about a Dodge but Ford had a real problem with flex fuel vehicles in some US Post Office fleets.
Last edited by Torque1st; 04-02-2006 at 07:13 PM.