Glad to hear things are getting better. May I ask what 15w40 you are using? I Thank YouUpdate: the "mechanic" that we fired last April has been the gift that keeps on giving.
We keep finding electrical splices after electric splices, 5 butt connectors in 2 feet of wire.
As those issues come up we work through them and fix them correctly.
As for the motor oil I have chosen, it's working great in both the gasoline and diesel engines with 10,000 mile oil changes.