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  1. 2020+ LM2 Duramax Powertrain
    Hi all, I sent an oil sample in to Blackstone and attached the results for those interested. The sample was of Amsoil’s 0w -20 diesel oil. Overall it looks pretty good. The sample results listed on the report at 16500 miles on 11/20/21 was using Ac Delco 0w-20 dexos D oil. I did use the...
  2. 06-07 LBZ & LLY Duramax Powertrain
    I've had to to add a 1/4 of a gallon of coolant to my truck twice in the past 2 years (both times in February). The last time the Check Coolant warning came I let the truck sit in 30 deg weather to cool down and I still couldn't remove the cap due to all the pressure behind it. I had to use...
  3. Alternative Fuels Diesel Additives Lubricants
    Below is my first oil analysis, The truck has about 10k with 5k on the current oil/filter. At what level should I worry about fuel dilution?
1-3 of 3 Results