Pretty sure it's W721546S450.
Edit: Nope, you were asking about a different screw. That holds the cover on.
Edit 2: W500301S442. Though that doesn't seem to have that collar. Okay, I give up.
You're looking at a max of 3%, under ideal circumstances. That's less than 1 MPG. That's going to be hard to discern on one tank of gas based on how many other factors can weigh in on fuel economy. My guess is that you did get better mileage than you would have gotten had you filled up with E10.
If you offered me any car, but I couldn't sell it, that had the Mustang name on it, the Mach E might be the one I chose. Mustangs in general do absolutely nothing for me, and never have (solid rear axel is NOT a sports car).
EDIT: I know Mustangs went to IRS in the later years, but the damage...
You don't need a front plate unless the vehicle is registered in a state which requires it. So no need to carry one for use when driving through a 2 plate state.
Yes. Almost doesn't matter what you replace them with. Anything will be better. I went with Kicker CS and even my wife, whose car it is and is not an audiophile, noticed an immediate improvement.
Edit: I replaced the dash and rear pod speakers. No reason to upgrade the kick panels speakers...
I'm in NY, and I bought my Lotus Evora GT in 2020 and decided not to put a front plate on it and figured I'd deal with a ticket once a year or so. I am temp[ting fate here, but 4 years later and no tickets.
That's crazy. Well okay, then. Mystery solved. And yes, both of my other cars have blinkers o the mirrors. Those sure as hell look like blinkers, so I just assumed....