Jack, the oil is what has changed. You still need to break-in rings just as your manual said to, only now we have the camshaft to worry about at the same time.
The zinc and other wear agents were removed from motor oils 5 or 6 years ago due to emmision standards of new cars.
Do a google search of motor oil and zinc and you will get weeks worth of reading. Some will be BS, most is spot on. Like I said in one of the above posts, it might be overkill for a stock 235, but is worth the money and time to chance it?
Joe
