As usual, I’m a sucker for into looking at any EcoBoost UOA. Thanks for posting it.
EcoBoosts often suffer from fuel dilution, and despite what Blackstone says, it’s possible yours does too…if you used a lab that legitimately tested for it through Gas Chromatography, you would have a better idea of how bad it is (or isn’t). Blackstone doesn’t cut it when it comes to fuel dilution reporting…they merely “estimate“ from the flashpoint reading. Oil Analyzers and TestOil use the proper gas chromo testing.
Now I don’t like seeing viscosity below the grade recommended. Whether because of fuel dilution, and/or shear, your MC is way below the minimum viscosity for 5w30...way below (That’s fact, not opinion). Yours tested at 8.12, mid-5w20 grade. 5w30 grade bottoms out at ~9.3? i had 2 UOA’s with viscosities at 8.2 and 8.4, and the fuel dilution was tested to be ~4.3-4.7%. opinion: I would think in Florida, you could “compensate” by starting with a thicker oil, and/or using an oil with a higher HTHS spec. Mobil 1 Euro 0w40 comes to mind, offering both higher HTHS and higher Kv100 viscosity…and available at Walmart. It’s a very well-regarded oil. Quaker State Euro 5w40 is another option as is Castrol Edge Euro 0w40. Note, all these are “euro.” There are members here using these oils in their EcoBoosts. I use Castrol Euro in my Subaru. I have used the “well-respected” Quaker State “American” Full Synthetic 5w30 in my EcoBoost, and it was borderline after only 3k miles…again a big part of the issue is the fuel dilution…so it makes sense to “compensate” for it…within reason.