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Difference in IVD is how much of sulfated ash each oil produces.
Which approval limits the SA the most? ACEA C3 / Porsche C30?
I have to look at some of my notes but iirc, it was the byproduct of oil additives (metal contents?) burning with fuel and creating ash and not necessarily what was added. No?
Is the SA number (without considering the fuel) a good gauge for the IVD amounts?
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