I was pleased to find that the oil level has not decreased in the ten days it's been sitting in the garage. Apparently the gasket conditioner I put in the crankcase is doing its job. But I was not pleased to find that the rear tire had gone nearly flat.
On the plus side, it means that it's not someone letting the air out. It's an intermittent leak, which I would have sworn was impossible had I not experienced it myself. WTF.
Pumped it up and rode to Walmart, discovered that the $2 Harbor Freight keychain tire gauge was no longer good--the o-ring that seals it against the valve stem has disappeared--so besides my pills (which cost $27, which was less than I expected) (or "had feared", perhaps) I bought a new tire gauge, a 4-pack of Chapstick, and a box of Little Debbie oatmeal pies.
Checked the tire, and it had lost 5 lbs on the way to Walmart. *sigh*
Okay, fine--I'll replace the goddamned tire, already. Shit.