Here's a pretty darn good deal for an oil change.
The place: Route 66 Auto Service. 525 E Route 66, Glendora CA 91740
This place will give you a $20 rebate voucher for your oil change, all you have to do is fill out a form during your oil change and they will mail it out and everything, so this means:
First Full synthetic oil change: $50
Oil changes from then on: $30!
and every oil change comes with a free car wash!