Could 2-cycle oil in my gas for 4-cycle engine be good or more economical to help preserve the function of a fuel pump. All I want to do is help the pump live as long as possible. If it can reduce piston/upper cyl friction, great. Lucas UCL at $.10c a gallon is too expensive. It's used at 3oz/10G ratio....that's 200:1, right? Is that a good ratio for fuel pump maintenance? Should I use something heavier, like ATF? I doubt if that burns clean. How economical is 2-stroke oil at 200:1?