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388 Posts
i have on mine, it felt like it lost some power when i tow my car around
 

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hah i would never try red diesel or bio diesel on a 6.7 L just personal preference and a friend of mine with a black mega cab 6.7 L has been running red diesel since the day he got it and that thing almost blows more smoke all stock than a turned up 12 valve its kind of embarrasing
 

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388 Posts
its the low/no sulfer in it, i put lsd diesel and it will run way better. ive been looking for some in fortworth to see if i could get some for dyno day and see if it makes more power
 

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run 20% bio since day one with no problems and truck is QUIET
 
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