haha, right at $5.65 per quart this Mobil1 ATF finally started making sense
yeah, 5qts is about what you can drain out from both trans pan and diff. last time I did that I think it was like 4.8qts actually IIRC.
when dropping the pan and replacing strainer it gets to like 5.3qts or so. would need to find my old thread where I posted my own numbers.
I think I will buy 12qts and do that V6 trans flush finally on some weekend

should be no more than $68+tax.
with 12qts, would be first 5qts drain and refill on trans+diff, then another 5qts for a cooler line flush and last 2qts for power steering flush
Before Winter I drained and refilled it twice with Castrol IMV (second time with pan drop and strainer replacement), so I assume almost all fluid was replaced already, it was only 1-1.5k miles ago, but in harsh Winter city conditions.
AAparts coupons:
http://slickdeals.net/permadeal/38690
EDIT:
seems that each AAp store carries only 7-8qts of M1 ATF, so would need to divide order into 2 pickup from different stores to have best price. anyways, I decided after second thoughts to go with drain & refill on transmission and p/s tank drain & refill after all, so 6qts should do the trick
UPDATE:
better deal alert
Mobil1 ATF 7qts with coupon code BIG25, price per quart after discount is $5.42 :thumbsup: