You supposed to check if there are any play in the wheels at 90k miles for sure. If there is any play (wiggling, back and forth) then you need to replace your wheel bearings. Mine went out at around 85k miles.
I have a 2005 Lincoln Aviator with 190,000 miles. The a.c. is not working but the drivetrain seems to be running fine. I change the oil and do the required maintenance.
All Lincolns from the year 2000 and up require 91 Octane. 93 Octane is recommended on all vehicles for best gas mileage and performance! ========================================================= According to the 2003 / 2004 / 2005 Lincoln Aviator Owner Guides : " Premium " unleaded gasoline , 91 octane or higher
Worn bearings from high mileage, poor maintenance, abuse,
The cluster has to be synced with the PCM. You'll have to get this done at a dealer.
2mpg
The emissions on or flashing on 2003 Lincoln Navigator indicates a malfunction or error being reported by OBDII system. The code must be read through a computer reader and the vehicle checked by qualified technician/facility. Leaving such conditions uncorrected can affect everything from gas mileage to causing the expensive replacement of catalytic converters.
The EPA mileage estimate for the 2008 Lincoln Navigator is 12 mpg in the city, 18 mpg on the highway.
The EPA mileage estimate for the 2009 Lincoln MKS is 17 mpg in the city, 24 mpg on the highway.
The EPA mileage estimate for the 2011 Lincoln MKT is 17 mpg in the city, 23 mpg on the highway.
The EPA mileage estimate for the 2014 Lincoln MKZ is 22 mpg in the city, 33 mpg on the highway.
The EPA mileage estimate for the 2008 Lincoln MKX is 16 mpg in the city, 24 mpg on the highway.
The EPA mileage estimate for the 2004 Lincoln Navigator is 11 mpg in the city, 16 mpg on the highway.