thanks guys for the info ths other dicussions were really helpful. the ool jeep jigger has 168,000 plus on it. stupid me hadn't even thought of changine the fuel filter but ive got ths stuff for a tuneup.let me get that done and ill let yall know if it helped or I know it cant hurt it. excuse my typing but I almost cut my index finger off and in a brace my typing and worth a flip to start with but anyhow thanks guys Bo US ARMY retired