So, I've been thinking about this all day. Not knowing the future status of Defy 10W-40 as of right now, I'd like to have options for a 40 grade to use in my Dakota. Clevy will already know my current dilemma, and for the rest of you, here it is. My Dakota is an '03 model SLT 4x4 with the 4.7 V8 and automatic transmission. It currently has 234.5K miles on the clock, and consumes oil at the rate of 1 1/2 quarts per 4K mile OCI's. It takes 6 1/2 quarts of oil, and for the last 2 OCI's it's gotten Defy 10W-40. I've just added a can of Liqui-Moly MoS2 and personally, I think it's an unbeatable, affordable combination. Now, as stated above, I don't know the future of Defy, especially 10W-40. This stems from 5w-20 now being SN/GF-5. If, to my despair, they were to discontinue the 40 weight, I'll be in need of a replacement. Now, my gut says just pair the MoS2 with QSAD 10W-40, and that is a very likely choice. I also consider M1 HM 10W-40, RT6 5W-40, ML 10W-40, and PYB/PHM 10W-40. All would be paired with the MoS2. Now, the replacement will be a 40 weight, and I know the consumption issue is mechanical aging, not PCV related. Just putting that last bit out there.