I tuned up my planer (Wow! What a difference). I thought I would go ahead and change the oil like it says to do annually. (Haven't since I bought it new in '99).
Where do you find 50wt Oil? I don't want to get a gallon; the auto parts store don't carry it.
How much does it take? Hobby stores sell it for $4 per 2oz bottle.
Can I just use 90wt or some other gear oil?