When Are rebuilds called for
I have a ninety-nine with 142,000...its used a modest amount of oil since it was at 8000 miles....about a 1/8 quart every 1000-1200 miles...
I made sure over that time to keep it topped off......but I have not noted any knocking or tapping
assuming a non-defective engine, with synthetic use since day one...how long would these engines normally maintain peak performance before needing a rebuild
What about upgrading the oil pump and the head to improve oil flow...are these parts available?