[SteveGerencser]

We already have tractors that are required to use only factory oil. The use of any other oil voids the powertrain warranty.

[mrguyorama]

Voiding the warranty is perfectly fine. I don't think it's the burden of Deere to support aftermarket modifications.

The current situation however is more like the tractor bricking itself and never working again if you attempt to open the oil reservoir yourself, without the per-requisite authenticated repairman keys