Also known as: AC-
AC has various meanings in the Product category. Discover the full forms, definitions, and usage contexts of AC in Product.
Percentage of non-combustible residue of a lubricating oil or fuel, as determined by ASTM D 482 or D 874. Ash reveals the presence of metals, including the calcium, magnesium and zinc introduced by additives. The heavy metals formerly used also appeared in the ash. or The solid residue remaining after a substance has been incinerated or heated to atemperature sufficient to drive off all combustible or volatile substances.
ProductLast updated: