I'm somewhat baffled by the purpose of some of the VOA/UOA often posted here.
The fact that TBN is still focused on by many is a bit strange considering many major engine manufacturers now have no condemnation limit for TBN. Many oils that pass manufacturers test now finish with less than 1.0 TBN D4739. The modern nonmetallic ashless additives simply don't respond well to the test. They concentrate on Oxidation and Nitration instead.
Here are some omissions that bother me with no indications of problems.
1. TAN (None)
2. Oxidation (None)
3. Nitration (None)
4. Sulfation (None)
(Sulfation is no longer as important with modern fuel).
When people have indications of fuel or soot. (You do a blotter on occasion, correct?)
5. Dedicated Fuel Dilution Test (None)
6. Fuel Soot Membrane Test (None)
Why people constantly try to guess when they are going to the trouble of doing a VOA / UOA I don't understand.
The fact that TBN is still focused on by many is a bit strange considering many major engine manufacturers now have no condemnation limit for TBN. Many oils that pass manufacturers test now finish with less than 1.0 TBN D4739. The modern nonmetallic ashless additives simply don't respond well to the test. They concentrate on Oxidation and Nitration instead.
Here are some omissions that bother me with no indications of problems.
1. TAN (None)
2. Oxidation (None)
3. Nitration (None)
4. Sulfation (None)
(Sulfation is no longer as important with modern fuel).
When people have indications of fuel or soot. (You do a blotter on occasion, correct?)
5. Dedicated Fuel Dilution Test (None)
6. Fuel Soot Membrane Test (None)
Why people constantly try to guess when they are going to the trouble of doing a VOA / UOA I don't understand.
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