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  1. H

    Rotella T6 5w-40; 3k miles; Duramax LML 17k miles

    The next sample will be taken with the vacuum pump and if it shows as bad as the first I will have a good excuse to install the Fumoto valve quickly!
  2. H

    Rotella T6 5w-40; 3k miles; Duramax LML 17k miles

    Thanks all. I ran the factory oil for around 3k and then switched to Rotella T 15-40. I ran that until the computer said to change it... I thought it was way long and that is what has landed me here, and with Blackstone. So, when that change was due I put in the T6. A friend borrowed my...
  3. H

    Rotella T6 5w-40; 3k miles; Duramax LML 17k miles

    Thanks, DNewton! I just looked at the Fumoto valve on Youtube and it looks like a must have! This DMAX rains on me now.. Also, as long as the engine is running I can take a sample without draining any first, or 'mid stream' without worrying about contamination? I just finished the fist article...
  4. H

    Rotella T6 5w-40; 3k miles; Duramax LML 17k miles

    I have been reading up all morning between meetings and plan to get a good sample with the vacuum right at 3k. Thanks for the replies, a wealth of knowledge here for sure.
  5. H

    Rotella T6 5w-40; 3k miles; Duramax LML 17k miles

    Hi All, I am new to the forum and could use some help with my UOA report. My rig is a 2011 LML with roughly 17,000 miles. I ran T6 for just under 3k miles and changed the oil to get my sample, to baseline this engine for testing and hopefully to extent my OCI. However, the results have me...
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