About four weeks ago I took a quart of Total Power and divided it up into four empty Soyshield Additive bottles (plastic) that I had saved. Yesterday I tanked up and when I went to use one of those small (12oz) bottles containing FPPF I founnd the bottle(plastic) had softened and was like soft rubber. Checked the other three bottles in my tool box and they to were soft like rubber. Immediatley chucked them in the trash container by the pump and got a fresh bottle of Soyshield out and put that in the tank. Anybody else had a similar experience. Would try it again but I'm out of FPPF. Wish I had taken a picture, those bottles were collapesing and the sides had overlapping folds just like skin on the fat,fat person.

Well, I guess one should be careful in bottle-swapping for content compatibility. I have a cleaned-out Sta-Bil squeeze/measure bottle that I've been using to dispense my FPPF for almost two years now without any problems (I really like the 1 oz. squeeze feature, since I dose two tanks of different sizes - AND it has a long nozzle that allows me to get the additive into the filler necks without spilling it down the paint). FPPF is a pretty concentrated blend of petroleum solvents and spirits, so it must be pretty different from SoyShield!

I have had a similar experience with Amsoil diesel additive. Originally I was using their "Diesel Fuel Modifier", which is strictly an injector cleaner, and intended for auto diesels and light duty diesel trucks. It comes in a 16oz clear, graduated bottle and is sufficient to treat 40 gallons. I used this because Amsoil, in their catalog states it is intended for light duty diesels, and the "Diesel Fuel Additive Concentrate" is intended for use in heavy duty diesel engines.
After quite a bit of reading here on the site, I became concerned about low lubricity in today's fuel. So I finished out that case of DFM adding 8oz of DFM and 8oz of 2 cycle oil to the tank at each fillup of approx 20 gals.
In the meantime I e-mailed the Amsoil tech dept from the dealer zone on their website inquiring as to why the DFAC was not intended for light duty diesels, as I wanted additional lubricity.
Reply was that DFAC could be used in light duty diesels OK, but due to it coming in 16oz opaque bottles and treated 100 gals, it was more trouble than most folks wanted to go to. Sort of like Primrose additive, I suppose.
I ordered a case and poured some of it up in leftover empty bottles from the ADM, clear and graduated. This worked out fine.
Amsoil also has a product, "P. I." performance improver gasoline additive that I was/am using in my '94 Lincoln MK8.
So I decided to save the P. I. empty bottles, as they were also clear 16oz graduated bottles. I filled about 4 of these bottles with DFAC and placed them in my bed mounted tool box.
After a few weeks of their being in the box, I noticed the same softening, discoloring to milky look,wrinkes, etc.:eek:
So I guess all plastic ain't created equal and these diesel additives also have some fairly potent ingredients.

I've been using Stanadyne's Performance formula in my 2004 GMC Duramax (LB7) for quite some time. Is there a better fuel additive out there that I am not aware of? I'm paying 17.++ a half gallon for the stuff, and it seems to be working okay, but is pretty darn expensive. :confused:

I've been using Stanadyne's Performance formula in my 2004 GMC Duramax (LB7) for quite some time. Is there a better fuel additive out there that I am not aware of? I'm paying 17.++ a half gallon for the stuff, and it seems to be working okay, but is pretty darn expensive. :confused:

Currently testing the following products:

RBP's High Performance Diesel Additive
E-Zoil's Diesel Aid+
Stanadyne's Performance Formula
Power Service's Diesel Fuel Supplement+Cetane Boost (the white bottle)
FPPF's Total Power
Doing a bench test and real (in the truck) test. All products have been bench tested and I am currently running E-Zoil in my truck. Next is Stanadyne. I will be posting an entire write up w/ pics as soon as I am done real testing all 5 products.

LATER!

I've been using Stanadyne's Performance formula in my 2004 GMC Duramax (LB7) for quite some time. Is there a better fuel additive out there that I am not aware of? I'm paying 17.++ a half gallon for the stuff, and it seems to be working okay, but is pretty darn expensive. :confused:

In the summertime, you only need the lubricity, fuel stabilization and cleaner components of the additive. I use Stanadyne lubricity formula (aka world formula) - it costs less for a pint and also treats twice as much fuel.

By using lubricity formula you also don't have to worry about the cetane improver destabilizing the fuel.

- jeff