HR4 Hot Rod SAE 10W-30 Synthetic Motor Oil, 1 Quart by Driven Racing Oil®. Great for small block crate engines. Features storage protection additives that guard agains rusht and corrosion during winter storage. 10W Multi-grade formula provides excellent start-up protection for flat tappet, overhead and roller cam engines. No ZDDP or additives required. Viscosity typical of 10W-30.