Passed on the gap insurance -- gotta draw the line somewhere. I do pay extra to have the valve caps installed with a mini torque wrench. The service writer recommended it strongly.
Yes. The Mk-1, Mod-0 regular old $0.25 plasticky valve stem caps will hold for the 78-percent (and droppng) N2 mix. And......as stated above you can get them either in the WalMart automotive section -or- in the parking lot.... I would suspect that even amoung Prius drivers.....the N-78 mix is probably the most popular tire gas out there. Swat I use mostly.