What is a 4.6 liter v8 engine lifespan?

Answer 1

Of course, the life of an engine is dependant upon continued critical maintenance intervals. But, given good maintenance, the probable life of a Ford 4.6 is @ 160,000 miles. I have seen some in use at 275,000 though that didn't smoke and had good compression and oil pressure. The highest miles to expect is not over 300,000. Of course, the best way to guarantee a long lifespan is to carry it everywhere on a trailer and refuse to start it and keep it in storage.