- Joined
- Dec 30, 2006
- Messages
- 29,558
^^This. They also destroy the timing chain systems. Those engines are getting blown left and right. I'd use a minimum of 10W30 if I had a V8 Mustang. If 5W50 was more readily available and not so expensive (I've only seen it sold by the individual quart) that's whet I'd use.That's the thing, they don't. Many of the 5.0's consume oil and end up being replaced or torn down. Thin oil does not help this mechanical problem. And, the move to 5W-30 might be a way to avoid or reduce excess oil consumption complaints.
I'd use 5W-30 synthetic and change it every 5000. I'm a lead-foot, but I know that highway and track are vastly different, and even "spirited" street use is quite easy on that engine.