1-Gallon Shell Rotella T6 5W-40 Full Synthetic Diesel Engine Oil $13 after $7 Rebate

Amazon.com has 1-Gallon Shell Rotella T6 5W-40 Full Synthetic Diesel Engine Oil $19.97 = $13 after $7 Rebate; previous frontpage was $14 after rebate.
Max rebate is 4 items. I did 4 separate orders with no rush shipping to sweeten the deal with $1 Amazon digital credits. FYI this is the new standard oil for FCA EcoDiesel’s.
Shell ROTELLA T6 5W-40 Full Synthetic Diesel Engine Oil, 1 Gallon (550045347) https://www.amazon.com/dp/B01LH7L…uBbP3RG093