DubFamily
Veteran Member
Do keep in mind, though: Other than testing like this; I use optilube in every tank and I enjoy driving my car daily 
Power Service DK 80oz 6pk from Amazon ships free w/Prime:* Power Service cost: from Walmart = $21 + 7% tax for 80 oz
Maybe so. If that's the case, it will save unnecessary wasting of product...if the goal is strictly mileage.From dubfamily's earlier, he did not that going over the recommended dosage for any of the additives gave much better mileage.
For walk-in store or free ship w/ $99+ order..I guess my intend with the cost of Power Service was to reflect the reality of people buying it from the store as opposed to mail order. Here is the summary of my results:
Additive____________Cost per mile
None (D2)__________$0.093
XPD_______________$0.087
Power Service_______$0.091
XL________________$0.087
That was what I was trying to get at. If you remember his last test the Summer plus did better than the XPD. Now the XPD did better than XL. So the cetane booster must be making a difference for him, since XL has such a low cetane boost.Sigforty: The XL has 1/3 the cetane boost additive that XPD does, IIRC. It's primary purpose is lubricity, not cetane boost, which may/ may not be why the MPG increase was less than the XPD.
Yes, I'm a fan of PS products but I have no problem switching over to a better product.Loudspl: You are comparing prices non-equal products... You have to add in the $99 Amazon Prime price, and normalize the cost (IE you gotta buy 5 gallons of PS if you are buying 5 gallons of Optilube...) to get a true comparison. I can go to the store and buy an ounce of saffron for ~$14 or 10 Lbs of sugar for $15; that doesn't mean the saffron is less expensive...
I don't think anyone has ever stated that Optilube is less expensive than PS; but at a price difference of less than a couple cents/mile...
Could be more power produced due to a reduction in friction in the HPFP. Something similar to what is seen when a thin synthetic oil is used in an engine.Yes, I'm a fan of PS products but I have no problem switching over to a better product.
My concern is more power oriented but reasoning says if you have a more efficient combustion process to begin with (indicated by improved mpg) you are also going to make more power.
I wonder if the reason the OptiLube stuff performed better than the PS DK was because of higher cetane additive? Or is there some other component used to give it the edge? As mentioned earlier, does anyone know the 2-Ethylhexyl Nitrate concentration in the PS DK?
Would be interesting to do a study with strictly cetane boost products like the new OptiLube Boost, Amsoil's diesel cetane boost, Redline's Fuel Catalyst/85 Plus, DPP's F-Bomb Hellfire, RP's MaxTane, and others..![]()
I was thinking on a similar line: more lubricity/less friction in the fuel system makes the engine system more efficient as it has also been shown by some folks in pre-CR cars using ashless two stroke oil mixed with D2 (not worth it in my view due to other potential issues with modern TDI engines).Could be more power produced due to a reduction in friction in the HPFP. Something similar to what is seen when a thin synthetic oil is used in an engine.
Can XPD be used on cars with gas ?
We will assume tha t you meant a 2012 Jetta TDI, or you're on the wrong site.Great work on this. I been an XPD user since both of the 2012 Jetta Tsi had 1,000 miles on them. Still going strong and no issues to report.
Great work