There's not much going on inside. It's just a gas station. :\ There's a nectary register, a food register...
Some coffee machines by the entrance...
A garage door, should someone need a tire change or something, and some couches easily pushed aside, used for TV and video games, since there's not much to do in the desert, and people hang out here.
It's best suited for a lot that has a road on either side. You probably don't have a lot the exact size as this one, but if it's just a bit bigger, it's easy to expand the asphalt. Or you can just remove the arrows.
And here's a closer shot of the pumps. These can be turned on (since they're on a different level than ground level, sims won't watch them) and it looks like advertisements on old pumps fitted with fancy new screens.
Size 40x24, so it's suited fine to one of the numerous 40x30 lots most worlds have.
Requires world adventures and nothing else!