I am fairly new here and absolute love the opinions/information that is presented. There are some things i dont understand and wrote a Mod a question, he suggested i start a topic on it, which seems like a good idea...I asked him what TBN was and received this response: TBN,total base number.How much acid buffering ability the oil has.
for short oil drain intervals,TBN is usually a waste of money.
a few questions i have are:
1. Moly: a friction modifier/friction reducer oil additive. Is that correct?
2. I have a Saturn 1999 SC2, my Son-In-Law, bless him, drove it approximately ten miles with the water pump belt off, obviously pegging the temp. gauge. My obvious question is did it tweak the head. The car runs fine at this point, has just a bit over 40,000 miles, but still i am concerned about the overheating episode. If i do a UOA it would show if there was coolant in the oil?
3. Chromium/Zinc/Manganese/Phosphorus; Just what does these measurement show/mean?
4. TBN; i seen in a VOA it was 10.8. Is the assumption that as this oil is in the car this number will decrease? At what point does it signify that the oil should be changed?
Any help appreciated!