Date registered: Aug 2004
Vehicle: 67 250SE Coupe
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RE: Just bought a1962 220seb convertible - What fuel???
i started with low test when i got the car, it did knock and sputter, but i didnt do a tune on the car at the time. now that i have the low test knocks some, so now i moved to mid test or high test. knocks are pretty much gone. i read thru my owners manual when i recieved it from ebay and it did mention octane at 96. i have not added anything other than injector cleaner and z-max. a general aviation mechanic swears by z-max,although its not called that in aviation lingo, sez just using the stuff on his rental airplanes frees the pistons when overhaul comes around, otherwise they are just a B!^(H to get out. also noticed the first 2 oil changes produced alot of carbon and build up in oil and filter after change. oil is clear now. i guess the fuel helped loosen crap in the induction system, valve, intake, etc.
that cat fuel sounds interesting, will bring it up with a few fellow techs at work.