I sit the bucket on the seat and siphon the oil in through the dipstick hole with a length of 3/8" clear plastic tubing :| it's pretty slow so I leave it siphoning overnight, by the next morning it's all in there.
Those pumps are worthless unless you have a whole day to spend pumping it.
As a society we used to haul 100 lb sacks of feed, 80 lb sacks of fertilizer, Cement and mortar mix and think nothing of it. I wouldn't think anything of slinging a sack of feed on my shoulder, or loading 2 tons of bagged fertilizer on the pickup every other day for three weeks, and unload it into the corn planter. Now we look for crutches to help with 35 lb pails.
Yes, boys & girls, I am including myself in this commentary, although I still can pour oil from a 5 gallon pail (for now).
Throwing a 80lb sack on your shoulder puts all the weight on your skeleton. Duck soup. Holding a 35lb weight out two feet from your body requires a lot more muscle energy. Try holding a one pound can of soup at arms length and see how long you can keep it level with your eye with your arm straight.
How do you get closer than 2 ft to a HST oil spout that is buried in front of the 3PT arms and almost on top of the rear axle? Many tractors are set up like mine. My solution has been to decant the oil into a two gallon container but a 5 gallon pail pumping efficient, would be an alternative.Thanks for the physics lesson, but I've been handling this stuff all my life. If you can't figure out how to pour a 5 gallon pail from closer to your body than 2 feet, buy a pump.