GDE runs T6 in his Gen III EcoDiesel with good UOA results. The concerns with T6 in the Gen III engine is about possible deposit buildup in the turbo. During testing, the engineers pulled the turbo off one of the test mules and saw deposit buildup inside the turbo, which led them to make the change in oil specification. With that said, the same turbo used in our Gen III EcoDiesel is used on other applications with the T6 spec, so there might be a different reason for the deposit buildup inside the turbo. Until more information comes available, I'm perfectly fine running Pennzoil Platinum Euro in my 2020 EcoDiesel.