How many miles will a 4.6 ford engine last?
How many miles will a 4.6 ford engine last? New Member. You can get 400,000 miles out of the 4.6 liter Mustang GT engine if you change the oil every 3,000 miles and if you also maintain your vehicle. It all depends on how much that you take care of your car. Police cruisers go up to 200,000 and 250,000 miles on these same engines. Is the ford 4.6 V8 a good engine? Ford's Modular 4.6 V8 has earned a highly positive reputation amongst owners in terms of reliability and longevity. The engine can easily run well over 200,000 miles....