Originally Posted by w123fanman

Posting this again here:
Mobil 1 motor oil is currently on sale at Costco, $10 off a pack of 6 quarts of full synthetic until 7/06/14, limit 3. The weights offered are 5W-20, 5W-30 and 10W-30 but are only available at the store. The price becomes $26.99.

Walmart also has a sale on Mobil 1 Turbo Diesel Truck 5W-40 synthetic oil for $23.97 a gallon, which is less than $3 off but I was surprised to see they even had it in stock, I was not able to find it anywhere besides online for a couple of years. The turbo diesel synthetic has usually been more expensive than their other synthetics, around $32 a gallon.