D-A Blue Flame HB-16™ engine oil is designed specifically for use in engines fueled by processed natural gas or other gas sources that may contain corrosive materials. It is a high ash, high TBN (16) natural gas engine oil engineered specifically for service in applications where fuel compositional characteristics can cause rapid premature engine damage. Additionally, it provides protection against excessive valve recession (sink) in gas engines which can result in operational problems. The HardBase TBN of 16 (HB-16) provides effective alkalinity necessary to control engine wear with corrosive fuel sources. The high ash level (2.24 Wt. %) satisfies Waukesha engine requirements when exhaust valve recession is a problem.

D-A Blue Flame HB-16™ is formulated with thermally stable, high VI base oils that are naturally resistant to oxidation. These base oils are combined with a unique additive system that further extends oil oxidation life. Although this natural gas engine oil is designed for severe service conditions with poor quality fuels, it can also be effectively utilized with processed natural gas in engines where high ash oils are acceptable.