My wife's 2022 Nautilus (22,000 miles 35 months old) gets better fuel economy on 93 VS 87. Not scientific, but she makes about the same 20-22 mile urban trip every day. To grocery stores, library, gym, etc. The dash MPG read out says usually in the 24.2 or so MPG on 93, and 22-23. or so on 87. This is not stop and go driving but does have traffic lights every 1-5 miles. Speed rarely exceeds 45 MPH. And it's been reading this way for past several months since I switched to 93.  And I know this is not a scientific test. And on a recent trip, saw over 30 MPG for whole tank. 34 once with a little tail wind. Now I know 93 octane fuel does not have more energy in it than 87. It has chemicals that reduce it's volatility so as not to knock and preignite. It just allows you to run more compression (direct injection allows this with a cooler charge) and timing. And our cars are tuned to pull timing on 87, and I can tell the slight difference in performance. Is it possible that when the CPU goes a while without detecting a knock, it goes back to a 93 octane tune. It still makes sense economy wise to use 87. 93 gives about 5% better fuel economy, and the fuel costs about 25% more around here. Mostly use Shell. And I doubt if carbon build up is any different on 93 VS 87. But I think 93 sure drives more "lively". For a 4200 LB vehicle, that little Turbo 2.0 has adequate power for a family passenger car. Anyone else notice this?

My guess is "legend" is a detuned 5.2 from the GTD. 

Agreed its a battery drain issue... We had this on a 22 Transit Connect. Replaced the battery and no longer get the weekly notifications from the Ford app that its shutting down functions when parked. 

No, of course not.  I was referring to an aluminum 7L Godzilla since Coyote can’t go as high as 7L.  Just change  Godzilla stroke between 7.3 and 6.8 to yield 428 cubic inches (7 liters) and make block aluminum to save about 100 pounds, making it close enough in weight to Coyote.  Could also be legendary 427 or 429 displacement. 😀

I'd bet on coyote based... maybe Godzilla, but doubt it. If you mean an actual FE 428, besides never happening, why would they want less power and more weight??

What does the owners manual say?

Ok, thank you.  My previous employer was an X planvpartner.

You need to know an employee or see if your employer is a ford x plan partner.  Employees no longer give pins to strangers.

Weak battery.  Might be going bad or it might just not charge enough while driving.  It doesn’t hurt to throw it on a charger once a month th or so.

How can I get a pin number?