Per this video with Lakespeed Jr, he mentions that due to the GTL base oil being so clean, Pennzoil was able to reduce detergent and ZDP levels. They also reduced moly for a reduced deposit level (more moly = more deposits). They're heavily relying on the base oil.
It seems to me that if you're using a highly additized oil, you should also have great solvency to help reduce deposits (SA increases deposit formulation). Unlike detergents, which prevent deposits from sticking, the solvency is what gives the oil the ability to break down deposits. We've seen this recently with HPL through oil filter debris. So a loaded-up oil better have good solvency is my thinking.
With companies using soy and other plant-based additives as well as phenolic additives, there is more than meets the eye and it's not a "cheapening" of a product. This is often where leading-edge components are being used.
GM and Cummins disregard TBN.
It seems to me that if you're using a highly additized oil, you should also have great solvency to help reduce deposits (SA increases deposit formulation). Unlike detergents, which prevent deposits from sticking, the solvency is what gives the oil the ability to break down deposits. We've seen this recently with HPL through oil filter debris. So a loaded-up oil better have good solvency is my thinking.
With companies using soy and other plant-based additives as well as phenolic additives, there is more than meets the eye and it's not a "cheapening" of a product. This is often where leading-edge components are being used.
GM and Cummins disregard TBN.
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