At my work, we mainly use Safety Kleen “eco power” blend 5w30 and their full synthetic 0w20 for lots of vehicles that require it. For VW and Audi we use Castrol. For brand new GM, GMC vehicles; they get AC DELCO 0w20 or 5w30 synthetic and AC DELCO filters. Anyone here work in a shop that uses Safety Kleen or a small brand of oil? Yes, the Safety Kleen oils we use are DEXOS 1 Gen2 and SN+