This is my 3rd UOA I'm doing to see how the oil fairs in different seasons with the 2.3 EB engine. This one was from 12/5/17 to 5/21/18. This run was during an unusually very cold winter. There were LOTS of remote starts and idling in single digits and very low teen temperatures. I was concerned that would really load the oil with fuel but it did not do it excessively surprisingly. At the time of the oil change the iOLM was reading 42% oil life left. Even though it sheared into a high 20 wt oil viscosity it didn't seem to worsen the wear metals to unacceptable levels. As a recap the first UOA was Mobil 1 5W-30 run for approximately in 3 months for 7,000 miles on long summer high speed travel. The next was a "tweener". It was Motorcraft 5W-30 that I ran it for 4,275 miles from 8/23 till 12/5. This was a one time use of Motorcraft oil as it sheared worse with less miles, 58% iOLM left, than both UOA's of Mobil 1 5W-30 under much harsher usage. I find it difficult to believe that Ford feels it's fine to run a synthetic blend such as their Motorcraft oil or a conventional oil that meets their spec for the full iOLM that seems to trend to 10,000 mile OCI's in their EB engines. But I guess if you don't plan on keeping the vehicle for a long time it doesn't matter, it'll get you through the warranty. We're doing the same the same summer high speed trips again this summer. I used 4.7 qts of Mobil 1 HM 10W-30 SL I had on hand and 1 qt of Mobil 1 5W-30 to make the 5.7 qts I needed. The Mobil HM is ACEA A3 and has an HTHS of 3.5. I thought this would help the turbo DI for high speed high temp driving. So far after 3,600 miles I've not used any oil so I don't think I have to worry about the cat being poisoned. I have many oil changes worth of Mobil 1 5W-30 that I got dirt cheap with their rebates that I'll continue to use Mobil 1 5W-30 especially since it seems to work well with this engine.
Whimsey
