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Old 11-20-2010, 02:29 PM
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which synthetic oil

I recently put on a black maxx, afe stage 2, and a 5" flo pro delete dpf delete exhaust on my 08 and want to know what is a good synthetic oil to run in my truck. It had 45,000 miles onher and is a 5w 40 ok to run even though the book says 15w 40. Thanks
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Old 11-20-2010, 07:58 PM
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Personally, I think you will be fine with a quality 15w40.

If you move to a synthetic, I would suggest Rotella T6 5w40, Delvac 1 5w40 or Amsoil.

Last edited by tjbrowder; 11-21-2010 at 06:39 PM. Reason: Grammar!
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Old 11-21-2010, 06:16 AM
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I also have run Amsoil and Chevron Delo 400LE 5w40 with good results (oil analysis).

Currently have Rotella T6 5w40 in her.
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Old 11-26-2010, 04:24 PM
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Quote:
Originally Posted by fx4superduty33 View Post
I recently put on a black maxx, afe stage 2, and a 5" flo pro delete dpf delete exhaust on my 08 and want to know what is a good synthetic oil to run in my truck. It had 45,000 miles onher and is a 5w 40 ok to run even though the book says 15w 40. Thanks
Yes, Amsoil 5W-40 "DEO" or their 15W-40 "AME" product code will work great in your DPF free truck.
Winter oil flow and cranking speed is hugely improved with Synthetic oil
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Old 11-26-2010, 05:03 PM
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I have had great luck with Valvoline Extreme Blue 5w40 full synthetic.
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Old 11-28-2010, 01:27 PM
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Quote:
Originally Posted by 08stroker250 View Post
I have had great luck with Valvoline Extreme Blue 5w40 full synthetic.
I second that, been running the same in my truck for the past 10K, works great.

James.
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