SAE 10 Non-Detergent Oil
I've isolated an issue with my furnace to the Combustion Gas Exhaust Blower Motor and that it needs some oil. I've read that I should put a few drops of non-detergent SAE 10 (or 20, which is better?) oil into the oil port. I've located the oil port (which looks like a small plastic tube).
Where do I buy SAE 10 non-detergent oil? I've looked at some websites for auto-parts stores, but they seem to only carry SAE 10W-30/40 which I believe has detergents in it. Perhaps, I'm incorrect. What is the sizes of container it comes in? Is there a type of applicator that would easily allow me to feed the oil into the oil port?
If you are curious, the issue with the Combustion Gas Exhaust Blower Motor is that it sounds like a helicopter starting up once the thermostat turns on the furnace. The sound subsides after about 20 seconds and only occurs when the furnace is started after a period of time of not being used (2 or 3 hours). I've read several posts on this website and several other websites that seem to indicate that the motor needs oil.
Thanks for your help.