I put winter tires on it.
Your Base model Mustang is never gonna give a shit if it's stored in a freezer.
Also: You are damn near in Canada with salt that stays on the road FOR FUCKING EVER, WHO GIVES A SHIT!!!
Runs like a Raped Ape right now. 21,000 Miles on a 2019 that uses about a tablespoon of oil in the catch can a year/oil change. No change in the Dip Stick.
Why are you comparing GPS speed with an electric/mechanical sensor?
You understand how GPS works? You have to have at least Four sats for any speed reading, let alone an accurate one. Back in the olden days, you set a GPS waypoint, you could get back to it within 150 feet.
And having used...
At 6500 miles the Dealer SHOULD have already changed the oil. Oil is a preference, filters pretty much are too. If you use a 10,000 mile oil, get a 10000 mile filter and change it at 5000 miles. The car will tell you when.
If it helps, put "Experts Say" or "Scientist say" in front of the...
Run a power cable on the passenger side, there is a firewall grommet in the passenger footwell to run the cable through. Pull the carpet under the glove box back next to the fuse box, you'll see it. Then just connect to the junction box in front of the battery.
Look at the Entertainment...
You flushed the system yourself?
Sounds like you might have air in the system.
Other than that I have no idea. I'm sure the other Mr. Knowitalls will help soon enough..
So the ONLY thing with this car that 'Stays On' is Launch Control?
But every other setting, you have to go through a 15 step menu hunt to turn On or Off?
I must now go play with Launch Control.