Local Advance Auto had 18 qts on clearance shelf and I asked to buy them all for $3 ea and manager agreed. They were marked 4.95 ea. My questions are, is this oil ok to run in street engines that are beefed up for 5-10k intervals? Anyone have an idea of the starting TBN of this oil, or ZDDP levels of AW additives? I'm hoping it's ok to run in say a hard-worked truck or sports car for about 5-10k intervals, depending on driving conditions. I guess I need to do a search here as well as look at some VOA's.