HKS Super Turbo Racing 5w40 Engine OilThe engine is protected from the thermal load of sports driving while achieving light acceleration. Effective against LSPI(Low Speed Pre Ignition) HKS bestseller engine oil series "SUPER OIL" are redesigned by the latest technology; an additive was prescribed and added to the oil to protect the engine against the effects of LSPI (Low Speed Pre Ignition) which tends to occur to a downsized turbocharged engine. Usually, LSPI occurs when low viscosity