I hate going to Walmart, but they sure do beat the shit out of auto part stores on stuff like oil. Had to go to o'reilly auto for a quart of M1 full synthetic and it was $9!!! One quart! I can get a 5 qt jug for $28 at wally world or 1 qt for like $4.90 or something. I just wasn't near one and im not passing one on the way home tonight, and I gotta change my oil tonight. Already 700 miles past the time I usually do.