0W40 grade is only available in quart containers.
At Amazon, they only have 0W-40 in quart bottles, but 5 qt bottles with 0W-40 are available at at least two other retailers...
They're actually 5.1 qts (4.83 L)
Advance Auto Parts has the 5.1 qt bottles in 0W-40 Part No. 98KY77
Buy Mobil1 0W40 98KY77 at Advance Auto Parts
($37.99 = $7.45/qt + tax)
NAPA has the 5.1 qt bottles in 0W-40 Part Number: MOB 112986
NAPA AUTO PARTS
(no price listed)
(The exclusive Mobil1/Amazon rebate does NOT require 1 qt bottles. It states "five (5) one-quart bottles (or multi-quart equivalent) of any Mobile 1 motor oil from Amazon.com". But for the 0W-40 from Amazon, we're required to purchase 6 quart case lot(s).)
Amazon charged me Sales Tax to NY, so I paid $6.73/qt + tax
I still saved $8.59 ($0.71/qt) on the 12 quart purchase, thank you.
I still need more, so beyond the rebate limit, I'll be visiting Advance Auto Parts for their 5.1 qt bottles of 0W-40 for my AMG motors.