Legally I believe if you get pulled over it's whichever comes first the number of passengers or the weight with gear. So mine is rated for 4 people or 650 lbs persons and gear, whichever you hit first.
The person on the tube does count also because if something happens you need to have the capacity in the boat to put them in it. At least that's how I was always taught in both the DNR and Power Squadron coarses I have taken.
It's also why they started making 3 person Jet Ski's way back when so you could legally pull a tube with them. You can't legally pull a tube with a 2 person Jet Ski.
Do you think it's better to use the Synthetic Blend or just stick with the Mineral Oil? I think it was $25 for the Mineral Oil and $35 for the Synthetic Blend. The motors run great and I figure they have ran for 14 years on the Mineral Oil as it is.
Another dealer in the Midwest that I know deals more with them said the Mineral oil would be fine for it since it doesn't have the RAVE? valves but he also said the Synthetic Blend would be a bit better and less buildup. He said as long as they both are BRP Oils it would be fine to mix them but I think you're right and if I'm going to switch it's better to drain.
I would probably put on new filters and lines at the same time also if I drain it.
I just purchased a 97 also the it lookes like it's best to flush them from the hose connection under the swim deck and not to turn the water on until after you start it. If you do it from the top ones I read you have to block off the hose going to that connection in the back.