Late last year I purchased a L1500DT. I haven't as yet done much with it. I live in northern Ontario Canada. I would like to replace the oil, going from 10W30(brand unknown) to Esso 0W30 synthetic XD-3 EXTRA. According to the Service Manual, when switching oil, to an oil of a different brand or different viscosity, the inside of the crank case should be washed and cleaned. To do this I need to drop the oil pan. The problem is the drive shaft won't allow me to do that. There has to be an easy way around this but I can't see it. Any help around this problem would be appreciated. Thanks.