Topsider save me cleanup time, therefore, I change oil as scheduled or as often as I wish. Before I had the Topsider, I delayed my scheduled oil change because I had to allocate at least one hour for oil change and cleanup.
It takes about 15 minutes to suck up all the oil from a diesel engine. While the Topsider is sucking, I can check the bottom of my car, change oil filter, or check on other part of the engine . If you drain the oil from the drain hole, you cannot really check the bottom of your car while the oil is draining. I think the Topsider can get as much oil out of a 617 engine as the drain plug does because of the location of dip stick.
[This message has been edited by be459 (edited 04-07-2000).]