D-Max Man, given your experience and expertize on the Duramax engine , perhaps you could advise whether in your view there would be ANY downside at all ( apart from cost ) in using MT - 10 in this engine particularly given that the jury is still out concerning oil additives generally. The website article your referred us to i.e. Snakeoil
would suggest this is not an adviseable route to take, particularly as in virtually every case the research is subjective and most of the promotional literature is in the form of letters from 'satisfied customers'. In other words if you had a Duramax , would you use it ??