quote:Did you not know that Amsoil does not submit but a few of their oils to the API ?
You're inadvertently or at a purpose misinformed about Amsoil's API certification. Just a few of the oils aren't API certified! You're going to ask now - why! Answer is: isn't it much better (and useful for customers, too) to spend $300.000 (or more!) a year for each oil type on to research or upgrades than for useless certification. Why useless? Wouldn't you call it exactly same if you had to yearly renew your high (or even primary) school diploma despite having been an (experienced) engineer (at least!) holding a bachelor's degree (or higher).