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Old 03-25-2017, 08:02 PM   #1 (permalink)
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Opti-Lube "Boost!" and "XPD" Diesel Fuel Additives

Another user on the forum claims using Opti-Lube XPD increased his MPG by 11%:

11% FE improvement with diesel fuel additive

XPD claims to raise cetane by up to 3 points, add lubrication to fuel, remove water and give the fuel anti-gel properties down to -10 F. However, they have another additive to increase cetane higher: "Boost!". It's mostly for raising the cetane rating, in this case up to 7-9 points which is more than other manufacturers I've looked at (Amsoil and Diesel Kleen) claim for their own additives.

Link to Boost on Opti-Lube's site:

Opti-Lube Diesel Fuel Improver | Grease | Oil Fortifier

They have a few other fuel additives for other purposes but I won't talk about them here; what I'm wondering is if anyone else here has tried it and if "Boost!" will increase MPG more than XPD for the higher cetane increase.

Here's a chart rating how well each of Opti-Lube's additives work for what application near the bottom of this newsletter from 2014. (I tried to find something more direct.)

http://opti-lube.com/downloads/newsl...014+Newsletter

Please do tell what you think.

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Last edited by 101Volts; 03-25-2017 at 08:39 PM..
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Old 03-26-2017, 01:27 AM   #2 (permalink)
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Diesel fuel needs moar lube?
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Old 03-26-2017, 01:33 AM   #3 (permalink)
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Older engines may need fuel that lubes the injector pump better since they were designed long before the ULSD mandate.
I would just use a little vegetable oil or 2 stroke oil.
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Old 03-26-2017, 09:59 AM   #4 (permalink)
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Even with newer common rail 5.9 Cummins it seems safe to use a little 2 cycle oil or standard ATF in the fuel occasionally. I wouldn't buy the magic wonder oils with their much higher prices.

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