so congrats on the buy overall! These vans, despite a few annoyances, are pretty good I'd suggest. So if the oil is quite new, I'd run the van for 3000 and then send the sample to Blackstone. New oil really won't show much and all Blackstone will do is ask you to repeat the sample. With some mileage on the oil it'll show much more about fluid contamination, metal breakdown etc.Of note is that Blackstone also will analyze trans fluid.I sent them a sample at my last trans fluid change and got some good info back.