John Deere does make tractors specific for your area so your tractor, if purchased through local dealers, will be equipped for your fuel. If, however, you buy outside (an EU, Japanese, USA/Canada, or Australian spec) there can be a problem. At Cat we do provide a de-tune kit for our machines because a lot of used machines end up in lesser regulated countries. It would cripple our customers if they couldn't peddle them to lesser regulated countries. In Japan, for example, high emissions engines are forbidden on most job sites once new emissions laws are implemented so they must peddle elsewhere. I am sure John Deere takes this into consideration as they are a worldwide country.