I've got the 10 gal version, and all four tires on my 1/2 ton trucks are usually flat when I need to move them. I usually get about 15 psi in all 4 on one tank fill, so would guess about 1/2 that with the smaller tank. Alternatively, as Don says, I'm looking for a good excuse to buy one of those portable Honda generators...and with a small portable pancake compressor that would power a nail gun, you could make quick work of it.

Allen
Yeah, well, that's just like, you know , your opinion, man - The Dude

1948 Chevy 3600 - goal Original restoration, Current Stage 1 - Disassembly and getting body in primer
1954 GMC 3100 goal Hot Rod, Current Stage 1 - Get body in primer
1931 Ford Model A 5 window Coupe - Old Skool Hot Rod
1945 Ford 2N Tractor - Runs great
1964 Ford 2000 Tractor - Use it every week
1974 Stingray Corvette