Sir, It seems you have the Zmax sales pitch down pat. So you ask what I use? I only use the best synthetic pure PAO oil on the market, period. That company has invested millions of dollars testing and making synthetic oil, so I would say they have the know how when it comes to engines and oils. With that said they have tested Zmax,Slick50,prolong,etc. The results are, surprise, it is junk science. In fact adding these products will make good oil go bad. As for the airplane industry, I think its great they choose Zmax. But I do not fly to work. Again find anything in writing from a manufacturer that states, add Zmax to our product.
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