I use it in my HD and my drag cars, If you look at my bearings from my race cars after 200+ passes compared to bearings that didn't have it there is a difference. The Amsoil bearings are coated and still look like they were just put in. Look at the Amsoil ball bearing wear test on there site.
Been using synthetics over 35 yrs now in everything,Amsoil the last 10.After reading everything I could get my hands on,Amsoil is the best hands down.Their warranty is worth the money you spend on their products.They are the ones who single handed took on HD, about using synthectic oil in their engines.Look who sells synthetic oil now.