AutoZone has a deal in this weeks flyer that's hard to pass up if you do your own oil changes.
5 quarts of Valvoline SynPower full synthetic oil AND a Fram Tough Guard filter for $19.99
To make the deal even better
Valvoline has a rebate of $1 a quart for purchases of 5 quarts up to 35 quarts but you have to be quick because it has to be purchased by April 15th. Here's a Direct link to the rebate