Originally Posted By: Fasttimez
Originally Posted By: fdcg27
If you do 5K drains then AP isn't for you.
Probably no syn oil is for you on such short drains. Waste of money.
On 5K drains, you should probably be going cheap while using an oil that meets whatever specs or certs your engine calls for, although even those might not matter much on such short drains.
85% of my driving is short trips city driving. My first UOA after I dropped the factory fill at 500 miles, I changed it a 5K, so 4500 miles on the oil. My TBN was 4.3, Blackstone suggested running to 7K & doing another UOA. No way would I run an oil out to the limits AP says it can handle, since I short trip so much.
That's a healthy TBN level and would seem to point to a 7K drain interval.
Was there anything else that gave you concern, like moisture, fuel, shearing or oxidation?