which oil is best?? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 06-24-2009, 03:21 AM Thread Starter
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which oil is best??

hello ,
ive just got a question for you guys who are more familiar with the duramax than what i am. my girlfriend just bout a 2002 lb7 alittle over a month ago and i was wondering what would be the best oil to run in it. its just a daily driver there is no gooseneck or 5th wheel hitch in it but she does occasionally hook it to the sled. so with that being said im just looking for opinions on what oil would be best for her truck. thank you for your help
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post #2 of 6 (permalink) Old 06-24-2009, 04:57 AM
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How many miles are on it? What else has been done to the truck, tuner - big tires - intake - exhaust?? Generally speaking all lubricants sold these days are good. Some are better than others if you have an extreme application. I believe synthetics are better, wal mart sells the rotella 5-40 cheaper than anywhere else. That is all I have used since I bought my '02 new. It now has 109k and doesn't lose any over 5-7k mi. or whenever I get around to changing it.

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post #3 of 6 (permalink) Old 06-24-2009, 10:01 AM Thread Starter
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ya i guess i shoulda been more detailed. it has a ppe hot plus 2 et. might have water injection here soon and it has stacks. i believe the last time i looked the odometer said 60,000 and that woulda been yesterday. o and i should said which synthetic oil is best because we both only believe in running synthetic oils so maybe that might help narrow the choices down alittle bit
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post #4 of 6 (permalink) Old 06-24-2009, 12:29 PM
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I have several D-max's running Amsoil and are very happy one is doing the 25k the others are doing 15k because of there mods and towing.

Amsoil 3000 5w 30 ,Amsoil EaAU Air Filter ,Amsoil Pre filter-EaPF13,
Amsoil Dual Remote By-pass BMK-16A, Amsoil ATF & Transfer case, Amsoil 75w-140 fluid front & rear end, Amsoil Antifreeze Fluid
Edge with Attitude, 4" Turbo Back Exhaust,
5" SS Tip
, Transmission Magnefine filter, Sportman Tonneau Cover & Bush Fender Flairs
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post #5 of 6 (permalink) Old 06-26-2009, 12:35 AM
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As long as its a synthetic oil and the correct weight and grade, you really cant go wrong. Just make sure its designed for diesel engines. Royal Purple, Mobil 1, Rotella, etc... are all good brands.


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post #6 of 6 (permalink) Old 06-30-2009, 03:01 PM
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I run Amsoil.

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