Waste Vegetable Oil

Comments — “With this third sample data, we can sit back and view wear metal trends: they look low and flat, just the way you want them to. The wear profile of this third sample from your 7.3L contains virtually no wear metal, except for a tad of iron. It’s becoming rather clear that this engine is wearing appropriately, with the oil consistently putting up such great data in testing. The TBN was 7.4 this time, denoting a lot of oil additive still active against acidity as of the sample date. No fuel dilution or coolant was noted. Add ~4,000 miles to this oil and check back then.”