Originally Posted By: TFB1
Originally Posted By: A_Harman
One interesting question about the oil itself occurs to me: Will re-refined oil have better resistance to shear, given that it has already been run in an engine? For example, will a formerly 40-weight that has sheared to 30 be re-refined as a 30, and therefore be shear-stable?
I'd think that after the re-refining process, VIIs would be added so it can shear down all over again... The used oil is no doubt going to be a mix of different weights & brands, I'd reason the reprocessed oil would get a add pack to create the new desired weight...
Extending the thought even further: Since the re-refined oil would be a blend of all kinds of base stocks, they could call it a synthetic blend, and charge more than for traditional dino. That follows the first rule of green-product marketing: Provide an inferior product, but charge more for it.