Gas prices here are pretty reasonable but not the best. I have used the car wash and it does a decent job but if you are willing to pay a few extra bucks just go down to the Terrible's Full Service wash at Pecos and Windmill. Still the car wash here is decent and can be done pretty quickly.
Smog tests can be done here very quickly if there's no waiting. I have been in and out in less than 5 minutes before.