People tend to check in during these times:
Follow Shell on Foursquare for tips and exclusive deals at Shell stations. Share your tips with us, too!
The drive through car wash has pigeons roosting in it
Roll up your windows and stay in your car
The car sometimes doesn't give you the wash you paid for. A few times I've paid for the deluxe but it doesn't do the undercarriage, rocker panel or tri-color wash. Beware.