I did on my 335d couldn’t tell any difference. Also tried it on my 7.3 psd and no difference. Most additives are unnecessary, except anti algae if you store the vehicle and your fuel has water (it all does)


In Houston we have 48 cetane diesel min. So it’s basically eurospec. I believe the d does best with 50 cetane. But never found the diesel cetane level made any real difference on a tuned car. Except maybe a slight reduction in idle noise. No difference in fuel economy on either diesel. If it does it’s so minor as to be undetectable.