*I believe in adding one 5 quart jug of synthetic oil to any order at Amazon to ensure free shipping for any items after that ... That's how I ended up with Amazon specials for : PUP , Castrol Magnatec , Castrol Edge , etc. I did the same thing with WM by adding a 5 quart jug of QSUD + a few misc. items to get the free shipping . We can always use the oil in our stash - right ?