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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +)

VW MKVII-Mk7 Golf family including Golf Wagon (~ 2015 +) Discussions area for the Mk7 (2015+) Golf and Golf Wagon TDIs based on the MQB (Modularer Querbaukasten) platform.

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Old October 1st, 2019, 20:54   #1
bigb
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Default Fuel additives?

Does anyone use them, are they not recommended? I am specifically referring to Opti-Lube XPD for lubricity and maybe a cetane booster like Stanadyne Performance. I run them in my old Powerstroke since ULSD started, the Stanadyne Performace does nothing for lubricity thus the Optilube which I have used in every tank. What do you use in cold climates for gelling?
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Old October 1st, 2019, 21:00   #2
JM Popaleetus
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Additives have been debated to death since 2009 on this forum.

Do a Google search for “TDIClub” + “Additives”.

Cliff notes are 2.5% Biodiesel if possible, and White Diesel Kleen if you have winter gelling issues.
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Old October 2nd, 2019, 07:41   #3
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Quote:
Originally Posted by JM Popaleetus View Post
Additives have been debated to death since 2009 on this forum.

Do a Google search for “TDIClub” + “Additives”.

Cliff notes are 2.5% Biodiesel if possible, and White Diesel Kleen if you have winter gelling issues.
Will do, on the 2.5% biodiesel are you saying to try and get a little in there or limit it to a max of 2.5%? It was my understanding that it was best to avoid any biofuel altogether if possible which I have been doing.
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Old October 2nd, 2019, 12:47   #4
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Will do, on the 2.5% biodiesel are you saying to try and get a little in there or limit it to a max of 2.5%? It was my understanding that it was best to avoid any biofuel altogether if possible which I have been doing.
Anything up to B5 (5%) is perfectly fine. Concentrations up to 20% are okay only if it’s a mandated concentration in your state.

Years ago, someone here posted a study that showed that a concentration of at least 2.5% offered the best lubricity protection.
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Old October 2nd, 2019, 15:38   #5
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I generally try and use diesel that has 5% or less in the mix. My normal fueling station near my house has this. There is a new thread on a new lubricity additive and I am trying it. The test document shows it has very, very good lubricity properties. I have tried many including Optilube and Standyne but haven't continued as there doesn't seem to be a real need, especially if you have some small percent bio in the mix. Here is the thread:

http://forums.tdiclub.com/showthread.php?t=502115

Generally additives aren't needed but some still use them and some swear by them. Really, really cold weather is one of the real legitimate reason for using an additive. If you have water in your fuel you need to find another fuel source. I have never found water in my fuel in the 15 years I have been driving these. Lubricity and cetane seem to be adequate for the job from the testing that Infineum does. It doesn't test enough to be a really good indicator but it is encouraging.

Whatever you choose to use you won't notice any difference and will probably need a lab to tell if you are getting the benefit you expect.
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Old October 2nd, 2019, 18:19   #6
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Thanks both of you for the informative replies. I read the thread on the new Hotshot additive and will follow it. Curious how do you actually know if it is doing anything or not?
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Old October 2nd, 2019, 18:36   #7
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You personally probably won't know. Like I said it will more than likely take lab testing to know anything for sure. You just have to look at their data and take it for granted it is helping. Maybe you might hear some difference but I haven't so far. Noticed no changes at all. Doesn't mean it hasn't worked though. I will finish the bottle and then determine whether I want to continue or not.
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Old October 3rd, 2019, 03:35   #8
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Optilube XPD in every tank of all the VW TDI vehicles I have owned.

Local Citgo station where I normally fuel is also 5% bio.
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Old October 3rd, 2019, 07:18   #9
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PowerService white bottle, I use in every tank on both TDIs. Keeps water from sticking around which is the real death of the fuel pumps. Also peace of mind fuel gelling prevention in the winters.
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Old October 3rd, 2019, 08:15   #10
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I run lubricant in every fill because of the fuel pump issues, I figure if it does any good that it’s cheap maintenance/insurance
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Old October 3rd, 2019, 10:00   #11
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I used to run PS gray or white pretty religiously, as well as driving out off my way for B5.

Since about 2014 I've just stuck with local Irving's (zero bio blend, local refinery) and haven't had any issues. PS white is only used for fuel filter change outs and occasional early season cold snaps.

I'd put more concern at your filling stations and fuel source than bio/additive blends.
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Old October 3rd, 2019, 13:49   #12
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In Pennsylvania b5 is the mandate. In addition we have the highest diesel fuel tax of any state.
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Old October 3rd, 2019, 14:12   #13
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Quote:
Originally Posted by thundershorts View Post
In Pennsylvania b5 is the mandate. In addition we have the highest diesel fuel tax of any state.
Which has nothing to do with this thread.
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Old October 3rd, 2019, 19:09   #14
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I use this on a regular basis o both TDIs and never had an issue..


https://www.wynnsusa.com/product/pre...uel-treatment/
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Old October 3rd, 2019, 21:16   #15
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Really no point in continuing to post what you use. There are already many, many threads here with exactly the same info posted. 100 more posts of "I use this" won't change anything.
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