Lead additive..HA!!!!! Lmao... You'd be running like 130 octane. Not only would you fail emissions because the sniffer would pick up all that lead and crap, which is very toxic by the way I'm sure, but your engine would probably take very very poorly to it..might damage components. These cars weren't meant to operate with lead...period. And being that it's illegal to use leaded gas, I highly doubt there's a lead additive..except maybe in like, Afghanistan...but then who has a car in Afghanistan?? 
__________________
'91 Mustang GT 5.0 AOD Daily Driver
Current stats: NEW 302 short block, E-303 cam (@.050, 220/220, .498/.498, 110 degrees), 1.6 roller rockers, Performer RPM heads (aluminum, 1.9/1.6, 60cc chambers), Cobra intake, Granatelli 75mm MAF, Billet AFPR, Equal-Length Shorty Headers, Off-Road X Pipe, Flowmasters, 4.10 POSI
13.73 at 103.8, ~2.2 60'
|