I just got one with over 270,000 miles
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
250,000 miles +/- depending on how much maintenance (like oil and filter changes, regular tune-ups, etc.) is done to it.
The Drive line has a life expectancy when properly maintained of 300,000 km (200,000 miles) to 500,000 km (300,000 miles) and many easily exceed this with proper maintenance. Unfortunately most start to have undesirable body and interior wear and fault issues starting at 250,000 km (150,000 miles) "ish" These minor issues can be kept ahead of by a good shade tree mechnic.
16 city / 23 highway ( miles per U.S. gallon )
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.
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.
These carburetors typically last anywhere from 5-7 years. I was unable to find the exact mileage, but you can always take it in to your nearest mechanic for a quick once over to see if you are in need of repair, plus you can find ways to prevent them from going bad so quickly.
The EPA mileage estimate for the 2007 Lincoln MKX is 16 mpg in the city, 23 mpg on the highway.
The EPA mileage estimate for the 2012 Lincoln MKX is 19 mpg in the city, 26 mpg on the highway.
The EPA mileage estimate for the 2003 Lincoln Navigator is 11 mpg in the city, 15 mpg on the highway.