Join Date: Mar 2006
Location: Republic of Texas
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I use a cetane booster in my 7.3 regularly, and I drop off almost 1MPG without it. According to the label it raises the cetane by 6. It seems to run smoother as well.
But to the original post, I personally am NOT a fan of additives, a wate of money and time IMHO. As 099f350 stated and Marc echoed, regular maintainence is the most crucial thing in longevity.
"Life is hard, it's even harder when you are stupid"