SP-4 barrel

SP-4

SP-4 is a high-performance leaded fuel designed for engines with compression ratios that exceed 14:1. SP-4 is an excellent choice where sustained high RPM/high-load conditions require a fuel that will meet these demands. An excellent performer in ultra-high-performance engines, this fuel is legal for use in all major sanctioning racing organizations. With a (R+M)/2 of 115 octane, SP-4 is designed to increase horsepower while protecting against pre-detonation and vapor lock.

Fuel Name
Color OCT (R+M)/2 RON MON SG RVP OXY Lead
SP-4
Purple 115 119 111 0.708 4.45 No Yes