Originally Posted By: Bluestream
Originally Posted By: Branson304
That's extremely interesting. I've had three 6.2L Super Dutys. One is a 2011 with 160,000 miles. Always had Motorcraft synthetic blend 5W-20 & it still runs excellent. The 2012 has always had 5W-20 as well. No oil related issues, or any issues at all. I honestly hope they back spec our trucks to 5w30, I'll gladly use it. A thicker oil during heavy towing is never a bad thing.
Why wait for Ford?
Because. Maybe this is just a design change in the engine for 2017 & 5w30 is the best oil after the design change, while 5W-20 is the best oil for my version of the engine. 5W-20 has been perfectly fine for me so I'm not switching unless Ford says so.