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    FIRST ANALYSIS ON DURAMAX DIESEL

    On my 1st sample my dmax had 3,000 miles on motor. I changed oil and took a sample at 6,000 miles. Copper 33, silicon 23. Sample was done by Blackstone.
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    Mobil 1 Synthetic Spray Lubricant.

    The reason WD-40 is blowtorch city is cause the older cans used PROPANE as a propellent. Thats why it works so well to start engines. I used it quite a bit to start an old diesel pickup that had a bad glowplug circuit. The new cans of WD-40 use a nonflamable propellent.
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    Schaeffer's 221 Report --Ball Joints, Steering knuckles, etc.

    I want to use one grease for the entire front end of my 03 GMC 2500HD. 221 or 238? This will be in a HOT Houston Tx climate.
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    Tractor oil

    We have always used Chevron Delo 15-40 in all our diesel engines, both truck and tractors. I have never noticed any problems.
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    What grease do you use?

    Kevin, I am also in Houston. Where did you find that Schaeffer's grease and do they sell the Schaeffer's gear lube there? I am also wondering just how thick and stiff the 238 is compared to the 221. Considering how hot it gets here we might be better off with it. Either one will most likely...
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