witch is better lease or buy

Depends on what your end goal is. Are you wanting to own a truck or are you wanting to keep running the newest equipment?

If new equipment is the goal, then perhaps a full maintenance lease (from a 3rd party or dealer) is worth exploring as you'll get new equipment every few years and all your maintenance is included in one payment and covered by warranty.

Like wise, if owning your own equipment is the goal than perhaps a lease isn't the best option. Honestly it's all dependent on your situation, your financials and your goals. Run the numbers and see what works for you.