Break-in 4 stroke engines in performance sports cars, hot-rods, sedans, flat tappets and other high output, modified or non-modified engines. API Standards: API SJ / SG / SH / SF / CD Performance mineral oil with elevated ZDDP (zinc-and anti-wear additive) content and extreme pressure additive levels for breaking in fresh race engines. Also suitable for regular service intervals for engines with flat tappet or high lift cams with or without roller bearings.