[JFP in PA]

Originally Posted by 941MXVET

I did, they told me that they didn't test for TBN in gasoline engine samples. Since I'm not concerned with finding my maximum change interval, how important is TBN?

Very, as it is telling you how the oil is holding up as well as when to consider changing it, a very important issue for the M96........

We run a fair number of UOA’s, both to track how customer cars are doing as well as keeping an eye on how the oil is holding up. We wouldn’t run a UOA without a TBN……………