Diesel Additive for 6.7

Steve Edwards

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What does everyone use for keeping your engine/fuel system/gas mileage in their 6.7 running top notch?
I have been using Hot Shots Secrets Everyday Diesel Treatment, and Hot Shots Secret Diesel Oil additive to the oil.
 
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12F350

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Where in the manual do you find advice for the additives you’re using? I don’t think it exists. To the contrary, I think Ford and other manufacturers for that matter recommends against using additives. I’m on my second 6.7. No additives- no problems.
 

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