Inliners International Forums General Discussion Engines Recommended oil weight for 292 inliner

The anti-wear oil additive is zinc dialkyl-dithio-phosphate, referred to as ZDDP. The dialkyl-dithio-phosphate is the active part. The latest 'CJ' rated diesel oils also have reduced ZDDP. You can Google "ZDDP" and find numerous articles with plenty of information.