I had to replace my exhaust manifold as soon as I bought it. It was the poor quality factory bolts. I put in 2 starters, the 1st replacement starter was bad. I get oil on the spark plug nearest the passenger side firewall. That causes my idiot light to come on and stay on. Having said all of that it is still the best truck in every way I have ever owned.
make the spark plug issue a recall or just fix at the dealer free and the same with the manifold.