Best factory warranty? Peterbilt, KW, or Volvo?

I had pretty good coverage through freightliner.
Even replaced the parksmart unit when it went out at no charge.

 

Back when I had my own truck I had one with Detroid Diesel DD15 and it had a special warranty for like 48 months or 600,000 miles and it included parts and labor. When I had warranty work the shops always called or looked in computer because it included labor. They do have extra warranty’s you buy not sure how much the parts and labor extra warranty is because my truck was used. I had big trouble with that engine Detroid Diesel did pay for all the warranty parts and labor. The engine had burnt piston and the piston liners were set wrong and rust in coolant ports in the block. Thought I might get new engine from Detroid Diesel but the told shop to take engine down to the block fix everything and put it back together. Took Detroid Diesel 3 days to decide that then probably another week for the shop. No bill for me just the motel room and food and downtime without running the truck.

I knew a guy who got Volvo truck with extras warranty it was like $7,000 part and labor warranty but Volvo also had engine hours limit in their warranty.