chzuck· Dirt Digger
I also heard pretty much the same concerning it requiring a lot of heat to really have an effect on the yellow metal. Years ago I bought GL-1 oil from McMaster Carr and more recently found GL-1 at a local hardware store made by the Warren Oil Company Inc (Warren Oil Company, LLC - World Class Lubricants - Motor Oil, Transmission Fluid, Antifreeze, Greases, and more!). I buy their SAE 90W and SAE 140W. I have also seen GL-1 at Tractor Supply labeled for the early Ford Ferguson tractors. Is there a TSC near you?