UPDATE: Just a reminder, I am by appointment only. I work overnights for my regular job and may be sleeping during the day. Call before you come. I'm an Air Force F-117 and F-16 Crew Chief and C-130 Flight Engineer retiree, serving 20 years. Currently an airline A&P mechanic, also working small engines in my off time. Working on jet engines I have been around synthetic oil for a long time and from my experience AMSOIL has proven to provide superior protection in many different applications, from big rigs all the way down to lawnmowers. AMSOIL has been made in Superior, Wisconsin for the past 50 years and was The First in Synthetics. Try it and you will see.