I don't think any conventional oils are cert. as A3/B3....especially the latter which means 'long-drain qualification'.
IMO, 40 and 50 weight conventional oils would certify as A3 even thoug not tested and advertised as such. Not sure on the B3 though....without UOA's at desired interval to verify
IMO, 40 and 50 weight conventional oils would certify as A3 even thoug not tested and advertised as such. Not sure on the B3 though....without UOA's at desired interval to verify