After looking into this the only thing I can find is a reference to 4,000 mile capacity[0], way less than a TDI service interval. Maybe they mistuned it just so customers wouldn&#x27;t have to pour a bottle of stuff into the tank, which would have been an awful idea. Or maybe the catalyst they used isn&#x27;t sufficient to meet US NOx standards with the optimum fuel-air ratio, I guess we will have to wait and see.<p>[0]<a href="https:&#x2F;&#x2F;www3.epa.gov&#x2F;otaq&#x2F;documents&#x2F;nonroad&#x2F;420f14017.pdf" rel="nofollow">https:&#x2F;&#x2F;www3.epa.gov&#x2F;otaq&#x2F;documents&#x2F;nonroad&#x2F;420f14017.pdf</a>