Tons of 5W-40 available at Walmart etc. for ~$25/5qt. jug. A bit harder to find the 0W-40 (SP) at a relatively good price, but Amazon has it for $27.48/5qt. jug right now for those who prefer it over the 5W for whatever reason. Just passing it along.
Cheaper at Walmart if you buy at least two jugs and "Subscribe" which gets you an additional 15% off. You can cancel the subscription after it ships...no harm, no foul. It is allowed in their terms and conditions.