Saw some old threads with a little on this but would like to get some more current feedback on using additives or whatnot to restore engine performance. ANyo0ne use fuel injector cleaner/additives? Brand? Reasoning? What was the result?
I'm dealing w/ a Tohatsu TLDI 50 DFI motor and has run great for years,but I feel the performance is dropping off slightly, runs a little rough at idle intermittently despite newer plugs and a fuel filter change.