[taibanl]

Guys,

I've used two tanks of this stuff and very impressed. In fact I've had never before seen MPG on my car. Over the two tanks (different regions/stations) I averaged 4-6 MPG better than average. There may be some inflation there due to ambient conditions/terrain etc. but I feel I have enough of a sample size to conclude that there's more than just marketing.

Diesel/Dieselect

Diesel-Dieselect The Problem
As temperatures drop, wax crystals can form in diesel fuels. The amount of wax in fuel can vary depending on the crude used to refine the finished product as well as the refining process. However, one thing is certain. All fuels contain wax, which if not treated, can seriously diminish the ability of fuel to flow freely through fuel lines and filters during periods of low temperatures. This can eventually stop fuel flow altogether, bringing 80,000 pounds to a halt along with your business.

The Solution
Our Cold Flow Package Dieselect features a cold flow improver that reduces the problems caused by wax. The additives in Dieselect modify the shape of the wax crystals so that instead of bonding to one another, they continue to flow. It is not magic but science at work!

While many marketers will target detergency and stability as the two criteria most readily met, most end users are left with the challenges of cold weather performance.

Kerosene alone is not the answer
Some marketers dose their diesel with kerosene in order to meet certain minimum winter operability criteria. While this will insure that fuel flows through your fuel system, it is accomplished at a great cost. Typically kerosene can cost as much as 6 cents a gallon over diesel fuel. In addition, kerosene does not provide the same BTU content as diesel. Simply put - you will pay more for less power and lower fuel efficiency. The cold-flow package in Gulf Dieselect gives your engine the low temperature protection you need without sacrificing the power and economy you deserve.

Gulf Dieselect

The Year Round Solution In addition to its superior cold weather characteristics, Dieselect contains these other carefully formulated ingredients, each with important year round benefits.

Cetane Improvers
Can add anywhere from 3 to 6 points to your cetane number producing a fuel that burns quickly and completely
Provide faster starting at lower temperatures
Reduce engine knock, noise, misfiring and case shock load, pressure and engine stress
Dispersant and Detergent Additives
Contribute to cleaner, smoother running engines; reduces exhaust emissions
Keep fuel injectors clean to maintain uniform spray patterns for maximum combustion efficiency
Dramatically modify and allow fuel flow
Lubricity Additives
Protect fuel pumps and injectors from premature wear and scuffing
Contribute to full burn so power isn't lost
Oxidative Stability
Prevents deposits, sludge and filter plugging
Maintains fuel stability with added protection against oxidation
Water Tolerance
Prevents the formulation of emulsion to keep fuel flowing freely through lines; allows drainage of water from fuel storage tanks
Permits some moisture to be absorbed and burned with fuel
Reduces shutdowns caused by ice blockage
Cleaner Fuel Systems Provide Maximum Results
The cleanliness of an engine directly impacts its performance. Sludge, rust, varnish and gum can affect injectors, disrupting the fuel spray and reducing fuel economy. Gulf Dieselect can improve the fuel economy of your engine up to 6.5%.

The following tests measure engine cleanliness:
Cummins L-10 Test
Injector deposits can lead to a noticeable decrease in power. This test determines a fuel's ability to control the formation of injector deposits.

Cummins N-14 Test
Increased injector corrosion leads to decreased fuel economy and injector life. This test evaluates a fuels ability to control corrosion. Gulf Dieselect in both tests, earned a Superior Rating.

Experiences on TDI forum, though rare, seem to confirm this.

What have you noticed?

[BB_cuda]

No Gulf stations around Texas so I can't do independent check for you. It could be the higher cetane number from additives. If wax is in all of our fuels and the gulf diesel has different shaped wax, chemically (in terms of burning) it's the same. Something else is up besides the wax.

[2deerwhistlers]

Haha I love the cummins N-14 that's a blast from the past! But not as old as the L-10! That one is completely mechanical

[Pierre Louis]

Originally Posted by taibanl

Guys,

I've used two tanks of this stuff and very impressed. In fact I've had never before seen MPG on my car. Over the two tanks (different regions/stations) I averaged 4-6 MPG better than average. There may be some inflation there due to ambient conditions/terrain etc. but I feel I have enough of a sample size to conclude that there's more than just marketing.



Experiences on TDI forum, though rare, seem to confirm this.

What have you noticed?

I've noticed an improvement in fuel economy with Shell in my area over Chevron. The car seems smoother with Chevron, though.

Here is an article on specific fuel consumption as well as particulate emissions with cetane as a variable:

The CN of diesel fuels has a determining effect on PM and unburned HC’s emissions. The increase in ignition delay time observed in fuels with low CN shifts the maximum pressure to angles above 20° after the TDC while simultaneously reducing the maximum temperature in the combustion chamber. This reduction in maximum temperature has a favorable effect because it reduces the cracking reactions of the high molecular weight fractions, thus reducing the emission of PM. On the other hand, with the increase in CN, the maximum pressure after the TDC is observed at angles smaller than 20°, providing a greater torque. This, in turn, translates into lower specific fuel consumption, increasing the thermal cracking reaction which favors the formation of PM and increases the speed of oxidation reactions, reducing the emission of unburned HC’s. The presence of sulfur in the fuel slightly increases PM emissions, but the determining effect on PM emissions is tied to the CN, which determines the maximum pressure in the combustion chamber. Overall, it was observed that increasing the CN by one number increases PM emissions by 8% and reduces HC emissions by 4%.

PL

[Pierre Louis]

But aftermarket additives that increase cetane have not, in most accounts, had any significant effect on fuel economy - its probably more the chemistry of the fuel as it is created at the refinery with specifically tailored additives by the major oil companies: http://www.which.co.uk/documents/pdf...0r3-186207.pdf and, IMO, the engine management system that adjusts various combustion cycle parameters which evens out the effects from fuels of different cetane.

I met a fuel station owner who has several brand-name stations, I believe Shell and Exxon. The fuel is not the same - each brand has its own terminals and distributes its own blends.

When there is a shortage of one brand, distributors specifically ask the retail outlet if they would accept fuel from a different brand.

PL

[Got_Diesel]

Due to the cold weather here in the northeast, we've seen temps single digits or lower with windchill. I started using a cetane booster cold weather enhancer. I've noticed that my car starts easier and runs better. The car barely even flashes the glow plug light. I'm pretty impressed with it.

[Puerto Rican 335d]

Umm I hv been using Gulf Diesel down here, but, PUMA Diesel is the CLEANEST certified by U.S. Coast Guard, my friend was an engineer USCG why Active Duty and he confirmed it that they purchased their DIESEL thru PUMA cause it was the cleanest on the island. I cant say which is better but believe Gulf renders better

[bvanlieu]

There is a small Gulf on my way to a customer in Central NJ that does have Dieselelect advertised: I may give it a few tanks to see if there is any difference in MPG.

Really is painful trying to figure out if there is any better diesel in the area. I'll pay more for 45-46 vs the 40 we are guaranteed as a minimum, just no way to know in PA/NJ. Boo.

- b

[runbyu1]

Originally Posted by taibanl

Guys,

I've used two tanks of this stuff and very impressed. In fact I've had never before seen MPG on my car. Over the two tanks (different regions/stations) I averaged 4-6 MPG better than average. There may be some inflation there due to ambient conditions/terrain etc. but I feel I have enough of a sample size to conclude that there's more than just marketing.



Experiences on TDI forum, though rare, seem to confirm this.

What have you noticed?

What was your previous mpg and what are you getting now?

On a related note, I've noticed a similar but less dramatic uptick in mileage using the new Costco diesel. I got 38mpg on my last tank!

[dixy2k]

jet fuel is the answer