I absolutely LOVE coca cola in the glass bottles (from mexico) I get them imported from mexico by the case.. ( I live in a mexican neighborhood) needless to say,,,, Coca cola has caffeine, and caffiene is a mood and mind altering chemical ( kinda in the same boat as alcohol & drugs) needless to say (again) relatively EASILY OBTAINABLE in my neighborhood!!! Getting BACK TO THE SUBJECT,,,,,,,,,I dont know WHY you would even think that tetraethyl leaded RACE FUEL is in anyway BAD for your sled motor????? Although tetraethyl lead is NOT COMBUSTABLE.. I personally feel that it increases horsepower through steady use by COATING the combustion chamber and INCREASING The compression ratio... The tetraethyl lead content is LESS THAN ONE TENTH of ONE PERCENT and I think there is more TRACE MINERALS floating around from the last time they DROPPED fuel in the underground tank that creating a problem with tetraethyl lead!!! Also tetraethyl lead acts as an ASPRIN and ( LIKE ZINC in motor oil) (another HOT topic) also,, like YOU SAID,,,, helps with detonation.. LEAD also resists CARBON DEPOSITS and a good coating on your powervalves will keep them CLEANER!!!! I think your 2002 SRX has a Detonation control (knock sensor) already installed,, so I really wouldn't worry TOO MUCH unless you really HEAT UP those kernels!!!! I have 2, 2004 vipers with spark knock sensors and I have NEVER saw the light go on ( a good thing???) on either of them (except on startup)... I have a PRO E.T. 73 Dodge Challenger that runs 10.250 in the Quarter mile ( on a REALLY GOOD DAY!!!) and it likes 114 LEADED.. It ABSOLUTELY HATES unleaded fuel and SO DO I!!!! It ABSOLUTELY LOVES a HOT MOTOR ( still can't figure out that one YET) and REALLY COLD ambient air (that ones a NO BRAINER).. My point is that I PERSONALLY don't think we will EVER SEE the day when ALCOHOL is MANDITORY in RACE FUEL!!!!! ( at least WE HOPE NOT!!!!) Gary Oles nosboy