Rear gear oil

Well, I was putting the wheels back on today. They seemed to come off much easier than they went back on, but anyhow, I was back there hanging  around the rearend, and thought I should change the gear lube. I had checked it before, and it looked good. Wasn’t low and the oil still looked healthy, but changing it would be cheap insurance.
So, the book says to ride it for 15 minutes to warm it up before draining it, and I thought I would just ride the bike to the autoparts store at the end of my neighborhood to warm it up. Now, I have been keeping the tank low on gas while I was working on it since I had been removing it frequently but I thought surely I had enough to go to the end of the street. Well, as I pulled into the autoparts parking lot it sputtered and died. So I had my first experience of switching to reserve and leaning way over while trying to get it to fire up again… Atleast it happened to me sooner rather than later. Luckily the autoparts store is next door to a gas station.
Long story short, my rear gear oil is changed, my tank is full, and I’m hoping to pass inspection tmrw.