By VulcanDrifter: But there are various auto oils, particularly for diesels, that have elevated wear additives (although some people think that's going to change) that are rated JASO MA.
Heavy duty oils marketed for diesel engines typically have the anti-wear additives, particularly ZDDP. The MSDS should list the amount of ZDDP (or its equivalent, depending upon the mfg). If not listed, then I won't use it. I use Shell Rotella or Chevron Delo, because they're the least expensive. Valvoline Premium Blue is another heavy duty oil, but I've never seen it on sale at a price remotely comparable to the other two.
1981 KZ650-CSR. Competition, Sports & Road.