We have two tractors both made by Case in England. They would cost about $95,000 each to replace so Roberto and Ramon understand how important it is to take care of them. A very long time ago a mentor of mine said there are only three things you have to do to take care of a diesel tractor... Change the oil, change the oil and change the oil. It is something we have followed very carefully and so far it has worked well for us. Roberto’s tractor needed a new battery and alternator last week but then the tractor is five years old. The oil is saved by us and then taken to a large tank for recycling at the local dump.