I tried several (irritating) methods for adding oil to my 2002 Patriot Monticello, and finally found a workable solution. Like one of the previous replies, I found a one quart hand siphon pump that is sold for the purpose of adding oil to the lower end of an outboard motor. Found mine in the boating section at a Wal-Mart, though all Wal-Marts do not have a boating section if not located near a lake. The critical thing to note is that the screw on section of the pump with only fit a small mouth style one quart bottle. When making this purchase, I went to the automotive section, and held the pump (in a blister-pack) up next to a quart of Rotella 15w40 and noticed while the pump would fit the quart bottle, the mouth on the 5-quart size was going to be too large. So, I bought the pump, the single quart and the 5 quart (or gallon) too and a funnel. When adding oil, I now fill the quart bottle from the larger size, and store the pump attached to the same quart bottle when not in use. Having said all of that, I have tried many siphons, etc, but the oil viscosity rendered many of them useless. This one worked for this DIYer, but still takes alot of effort to pump a quart of oil or more into the filler tube/engine.
This is typically not a problem for commercial shops with pressurized pumps and a shepherd's hook tube they can hang into the filler tube.
