Just read it from the RP website: http://royalpurple.com/prodsa/rpmoa.html
that the RP 10w30 are now API SL, CF-4, CG-4, CH-4,CI-4. With CI-4 rating does it mean that the additive detergent level is greatly increase from the old formulation?
that the RP 10w30 are now API SL, CF-4, CG-4, CH-4,CI-4. With CI-4 rating does it mean that the additive detergent level is greatly increase from the old formulation?