Found a good deal for anyone who uses or would like to use 15w-40 oil. Mobil has a Spring rebate - $5 off a gallon of Delvac 1300 Super 15w-40. I just bought some at my local farm supply store (Mills Fleet Farm) for $12.95 a gallon. That's $1.99/quart after rebate. Just make sure you buy from a participating retailer
Four gallons is exactly three oil changes for us by the way; you can buy up to five with the rebate.
http://www.mobil.com/USA-English-LCW...offer-form.pdf