Valvoline (VV388-6PK) All-Fleet Plus SAE 15W-40 Motor Oil - 1 Quart Bottle, (Case of 6) Valvoline's All-Fleet plus engine oils are blended with premium base stocks and high quality additive chemistry Recommended for use in turbocharged and naturally aspirated two and four cycle diesel engines These oils can also be used in gasoline engines for the 'mixed fleet' operator Provides excellent performance in local stop and go routes, on-and off-highway, farm, construction and mining applications All-Fleet plus meets all the requirements for tier IV and is backwards compatible with tier III