Stealth,
As a Yong Heng owner, planning to switch to a higher flash point oil at next oil change, this is how I view your endeavor. First, I'll assume both SecoLube 500 and Mobil Rarus 827 are top choice lubricants for the "dive" compressor HPA system. Second, I'll be able to get a quart of either to my door for a few dollars, give or take, around $30. My concern is if any problem arose with my compressor, determined to be lubrication related, how would I stand on a warranty claim. With SecoLube I'd be the original, receipted purchaser, with original container, secured from a recognized vendor. Purchasing from the gentleman on eBay, or yourself, what warranty standing, if any, would I have? WM