[Richard]

First, don't put 13 gallons of oil in the S60 based on what you remember. Some hold 32 qts, some 36, and some 40 depending upon the oil pan. So start with 32 and look at the dipstick.

Do prefill the oil filters as much as possible. That prevents the bearings from starving too much on startup after an oil change.

It's hard to find a container that is low enough to slide under the oil pan and big enough to hold 10 gallons of nasty oil. That's why Forest suggested the Fumato shut off. You can fill a smaller container and shut off the oil quickly.

You have to transport 10 gallons of the nasty mess to a recycling center or auto parts place. Prepare to splash some of it on you when you pour it into their vat.

Steve Bare @"rheavn" has a neat trick of puncturing the oil filters and letting them drain before removing. I think he also puts a trash bag around the used filter.

Prepare to make a mess the first time, and used diesel engine oil is NASTY. The cheapest you will find Rotella is about 130 for ten gallons. And you need two oil filters at around 25 each. Now you need an oil filter wrench, a drain pan, and a gallon of hand cleaner. Don't plan on wearing the clothes you are wearing to a formal .

It will be tight under there even with the coach all the way up.

So, if you are changing the oil at around 10k miles how often do you need to change it?

If you haven't picked up on this, I am trying to talk you out of DIY.