Performance of 1.0% and 1.45% Ash - SAE 15W-40 Oils in On-Highway Trucks With Cummins, Caterpillar, and Mack Engines

The performances of 1.0% and 1.45% ash, SAE 15W-40-CE/SF oils were compared in on-highway trucks with Cummins, Caterpillar, and Mack engines. This field test was unique in that all the engines were new and premeasured by the OEMs.

It was found that 1.0% ash oils provided: (1) wear control equal to 1.45% ash oils and (2) oil consumption control better or equal to 1.45% ash oils.

The 300,000-mile (482, 803-km) field test demonstrated that mixed diesel engine fleets can get maximum engine life to overhaul using a high quaiity, CE/SF, 1.0% ash--SAE 15W-40 oil.