I've used Prolong in my aircraft every oil change for 4 years. The FAA aircraft mechanics could not understand why my engine would checkout so good on the compression test every 100 hours, along with oil analyses coming back showing very little wear, when according to them, that type of engine should have needed a top overhaul between 1200 and 1500 hours of use. Here I was at 2300 hours getting compressions of a 600-800 hour engine, oil analyses coming back clean and not even close to needing a $5000 top overhaul. Since the FAA is a little funny about what we put into our aircrafts, I just kept my secret to myself -- until now. This aircraft is still baffling FAA mechanics with the compression tests and oil analyses. I'm sold on Prolong and use it in all my ground vehicles too, of which I have seven. I buy it by the gallon and am happy to do so.
