For in-store pickup only, Advance Auto Parts offers the Shell Rotella T6 5W-40 Heavy Duty Fully Synthetic Motor Oil 1-Gallon Bottle
for $22.99. Coupon code "DOW9" makes it $16.09. That's $10 below the best shipped price we could find. Sales tax is added where applicable.
Update: Redeem this $5 mail-in rebate to drop it to $11.09.