I got the deal of a life time at Auto-Zone, Went to the back where all the Oil is, looked around and saw a display off to the left of me, 5/30 10/30 Mobile 1 for $3.99 a qt. So I said to my self (must be mismarked). I ask'd the sale's person standing there if it was the correct price, She said YES, they changed the graphics on the bottle, so we marked them down, I grabbed 10 qrts and told her to ring them up separate (5 at a time), gave her my $10 coupon and the total with tax was $10.26 for all 5 qrts. Her eye's lit up and she blurted out H*&Y S#!T. Now I can never beat this deal ($2.05 w/tax per qt) on 100% synthetic oil. My Truck will be very happy - and I had a $20.00 credit from the promotion of spend $20 5 times, get $20 credit back - SO IT COST ME a whopping .52cents for 10 qts.