oil leak, worn rings burning oil if only a quart or two between oil changes not too much to worrie about on some engines but would have checked out.
NO !
To add the sae 10 non detergent oil to your furnace blower motor you will have to open the motor section.
Nothing if they were approved oils. You can mix 10w30 with 5w20 etc. Not a good idea but you can do it. You can mix brands with no problem.
through the oil filler cap on top of the motor
What happens when your heart stops? The motor would seize, thus no more motor!
the motor gets lubricated.
Motor oil is used to run cars. Cars add pollutants to the air when they are running. This is how motor oil can be harmful to the environment. It can also kill plants and animals if not gotten rid of properly.
Remove the crankcase breather cap up in front of the engine and add motor oil down the tube.
16oz
4 qts of motor oil then check and add only if needed.
If there is no oil tank on the engine, the oil must be added to the fuel.
not a lot mate