Originally Posted By: kevhal777
I just got results back from a UOA done with 3000 miles and 2 years on the oil, no makeup oil added. I have a 30 quart pan so 3000 miles is nothing. The results were excellent. TBN was 10.3, all the element ppm's were well under the universal averages, insolubles was 0.1, no water, antifreeze, trace fuel. Blackstone said to run it out to 7000 miles next time. At my use rate, that would be at least 4 years. I really wonder now why there is so much emphasis on changing every 6 mos. or year if you haven't reached a mileage-based interval. The results of this test don't give me any reason to change it at 2 years, which is already double the time interval everyone says is critical.
Considering the highest TBN of 11-12(?) for HDEO, time did nothing to the oil. If the Beretta lives long enough to run the 15K I plan for the 0w40 that's in it, I'm thinking of taking a sample. The oil should be there for close to 5 years at that point since I drive 4 other vehicles. Although I pray to God I won't drive that bucket for that long.