I guess I'm also lucky. I have an off the shelf 342R Roush motor with over 17,000 miles. With the exception of a new distributor cap and rotor, the motor has never been worked on or had parts replaced (it has the original spark plugs). It uses approx. 1/2 quart of
oil per driving season (3500 miles). Yes, it has a lumpy idle and only gets 16 mpg, but it has been flawless. Up to this point, I'm a very satisfied Roush owner.