Shells nine ingredients promise top performance in Super Shell
Shell details nine components boosting power and efficiency. TCP additive may boost power by up to 15 percent and fuel mileage by about 17 miles per tank, while butane and pentane blends improve cold starts and warmups. Alkylate controls knocking, cat-cracked gasoline raises octane, and Platfor mat boosts energy release, all aimed at smoother, stronger engine performance.