Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts? - Diesel Forum - TheDieselStop.com
1999-2007 General Questions General questions related to 1999-2007 Super Duty trucks. If it doesn't fit the other categories, post it here. Gas engine discussion that pertains to all models is allowed. Specific gas engine questions should use the Gas Engines forum.

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post #1 of 49 (permalink) Old 07-06-2005, 05:39 PM Thread Starter
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Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

I posted a thread that got pretty large about my pulling a horse trailer of only 4,800 lbs and the truck was a DOG. With no load it seemed pertty fast but Ive only driven mine & dont know. We even started to think maybe the trailer brakes were dragging.

I was running Texaco fuel at the time. Last week when I ran low I got about 10 gallons of Shell because it was close to my house but then filled up with Chevron at a lower price. After about an 1/8th tank of use, I pulled the trailer again today. Totally different. Different sound, a lot more power, and a curious egg smell to the exhaust like my gas truck with a hot cat converter.

No problem pulling the trailer up a hill and even my 13 year old daughter said the truck was quieter. Is this an amazing coincidence? Maybe something else bad quit being bad? Can different fuel brands make that much difference?

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post #2 of 49 (permalink) Old 07-06-2005, 06:57 PM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

IMO no, i fill up with different brands of gas all the time, whoever is cheapest, can never tell the difference [img]/ubbthreads/images/graemlins/shrug.gif[/img]

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post #3 of 49 (permalink) Old 07-06-2005, 11:14 PM Thread Starter
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

I take the lack of response to mean I am nuts but everyone is too polite to say it [img]/ubbthreads/images/graemlins/crazy.gif[/img]

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post #4 of 49 (permalink) Old 07-06-2005, 11:25 PM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

They send the batches of fuel premium, regular no lead, etc through the same pipe line and to different brand tank farms here. The tank farms are all grouped together to use the same pipelines.
Additives are stored in their own tanks and added when loading onto the trucks.
One thing you have to watch, in our area are the gas stations, marts, etc run by Asians and Indians. They tell the delivery people to put regular into their premium storage tanks. The same goes for diesel.
I got some at a "BP" station that foamed like dish soap and smelled more like straight kerosene than diesel. The engine didn't like it. I now have ,what I'm afraid is some injector damage. it is knocking more and idleing rough.

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post #5 of 49 (permalink) Old 07-07-2005, 03:06 AM
 
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

The diesel in our area comes from one distributor up in Kelso. They supply all stations down here. You might have gotten some fuel that has been sitting for awhile. Find a station around your house that sells alot of diesel and stick with them.
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post #6 of 49 (permalink) Old 07-07-2005, 03:24 AM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

We have big 300Gal tanks of died red that sit for months and ocasionally i have to limp to the station on that. No differnce. The only difference i have is when i tried B20 biodiesel. It smelled like a korean restaruant and it gave it some more power and MPG but other than that i havent flet any differenece in fuel. [img]/ubbthreads/images/graemlins/shrug.gif[/img] I was told that i could only run 5% bio in my truck so now thats what it gets.

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post #7 of 49 (permalink) Old 07-07-2005, 05:20 AM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

Marvin,

While this is only a guess, the only thing that I can think of is that you might have gotten a batch of fuel with a lot of water in it. I don't know how much it would take to make an engine run funny, but IMO the stock filter setup and any filter that tries and filter water via an element for that matter does a poor job in the water department.


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post #8 of 49 (permalink) Old 07-07-2005, 06:05 AM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

Guess I'm nuts too.....

In my '99 SD if I use the fuel from Wal Mart or Shamrok my mileage is lower and the truck has less power and knocks more. When I use fuel from Love's, Exxon or Shell, I get better mileage and the engine is quieter and smoother.

Now the '96's are a differnet animal, they could care less what fuel you run.

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post #9 of 49 (permalink) Old 07-07-2005, 07:19 AM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

I have to agree some what on different brands of fuel. Some brands I get better mileage on than I do others,(same trip, driving condition etc...) I know some of the brands come from the same BULK plant though, ALL the Exxon, Shell comes from the same plant in Roanoke, VA. The BP around here comes out of TN.

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post #10 of 49 (permalink) Old 07-07-2005, 03:59 PM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

I thought I remember something about the Shell fuel already having an additive in the fuel, thats one reason they always are higher on the fuel prices....

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post #11 of 49 (permalink) Old 07-07-2005, 04:35 PM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

This one has been batted around forever. Diesel fuel is a commodity product, which does have to meet a certain standard (ASTM 975?). In any given area all the fuel comes from the same tanks at the same terminals whether it is #2 heating, red dyed for non-taxed off road, or headed for your favorite local dealer. We've had posters here that hauled the stuff and explained there is no "brand" difference, except possibly in the additive package that is added (to diesel fuel) to the truck when loading for delivery to whichever retailer.
It is unclear to me whether or not retailers could order different additive packages or concentrations of the same one, but that might well be the case. Obviously handling issues of freshness, cleanliness, and water contamination would vary with each station. If the additive packages were different, the fuels from one brand to another might be too, but how much difference could that make in mileage or performance? Too little to measure would be my guess. You can buy the same stuff in a Stanadyne or Power Service bottle and prove that. Water management, lubricity, and cold weather insurance are better reasons to use the stuff, and if you're willing to bet it's already in there, you probably don't need them.
Then there's the issue of #1 #2 winter blends which will definitely reduce mileage.

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post #12 of 49 (permalink) Old 07-07-2005, 05:21 PM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

Marvin,
That's a great question and no - you're not crazy. Let me begin by telling you that I work in a major refinery on the Gulf Coast in Beaumont, Texas and I've made gasoline, diesel fuel, jet, avgas and other fuels for 25 years so anything I tell you is fact and not opinion. Many companies buy products from each other for many reasons - to save transportation costs, because of lost capacity due to problems or shutdowns (like BP in Texas City right now) and other reasons so there is no garantee that , for example, the Chevron diesel that you bought may have been made in an Exxon refinery. There are standards that all manufacturers must maintain and the Dept. of Agriculture audits fuel stations regularly. Some of you may have seen them. They present the clerk with a voucher and then they fill a 5 gallon can for a testing sample. That is why the dealers that put regular in the super tank won't be in business for long. I'm not sure how often these audits are done, but I can't imagine that it would be any less than once a year and it is always a surprise inspection.
No manufacturer has a fuel that is superior to anyone elses. No manufacturer will exceed the required standard because of lost revenue. If they sell diesel with a higher cetane number or gasoline with a higher octane number that is called "product giveaway" and the business climate won't tolerate that.
I have no doubts that you did, in fact, feel a difference in fuel of different brands. Let me assure you that the difference was due to age or cleanliness of the fuel or possible water contamination and not any variance in fuel quality from one brand to another.
If you have any questions about fuel or the manufacturing process please feel free to PM me.

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post #13 of 49 (permalink) Old 07-07-2005, 05:48 PM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

I pass by the tank farm that Shell uses in Pasadena, Texas and there are some tanks labled Premium Diesel Fuel Additive. I spoke with a tank truck driver at a Shell station one day while filling up with premiun diesel and I asked him if there was a difference in Shell diesel and Shell Premium Diesel and he said there was. Premium diesel has an additive that is blended with regular diesel while the trucks are being loaded. He also said it was for smaller diesel engines and had a higher cetane rating than #2 diesel. My 2000 PSD Excursion runs better and quiter and gets better mileage with Shell premium diesel. My worst mileage is with Murphy (Walmart) diesel.

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post #14 of 49 (permalink) Old 07-07-2005, 05:50 PM
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

[ QUOTE ]
Marvin,
That's a great question and no - you're not crazy. Let me begin by telling you that I work in a major refinery on the Gulf Coast in Beaumont, Texas and I've made gasoline, diesel fuel, jet, avgas and other fuels for 25 years so anything I tell you is fact and not opinion. Many companies buy products from each other for many reasons - to save transportation costs, because of lost capacity due to problems or shutdowns (like BP in Texas City right now) and other reasons so there is no garantee that , for example, the Chevron diesel that you bought may have been made in an Exxon refinery. There are standards that all manufacturers must maintain and the Dept. of Agriculture audits fuel stations regularly. Some of you may have seen them. They present the clerk with a voucher and then they fill a 5 gallon can for a testing sample. That is why the dealers that put regular in the super tank won't be in business for long. I'm not sure how often these audits are done, but I can't imagine that it would be any less than once a year and it is always a surprise inspection.
No manufacturer has a fuel that is superior to anyone elses. No manufacturer will exceed the required standard because of lost revenue. If they sell diesel with a higher cetane number or gasoline with a higher octane number that is called "product giveaway" and the business climate won't tolerate that.
I have no doubts that you did, in fact, feel a difference in fuel of different brands. Let me assure you that the difference was due to age or cleanliness of the fuel or possible water contamination and not any variance in fuel quality from one brand to another.
If you have any questions about fuel or the manufacturing process please feel free to PM me.

[/ QUOTE ]

I can vouch for what he said 100%. I used to work in a privately owned EPA certified laboratory in Pasadena, Tx (near all the big refineries). We would test all the different manufactures fuel/ oil at different times of the year (there are quite a few refineries off HWY 225 in Pasadena, Tx). None of them will make their fuel better, no matter what they say. It is a loss of money for them to refine there fuel more and they will not do it. When people say they got bad fuel, it's usually because the fuel tanks (at the fuel/ gas station) are either old, the fuel is old, the fuel station does not get a lot of traffic or it has moisture/ water contamination. The best place to get fuel from is a place that gets a lot of traffic through it. That way, the fuel is usually newer than the station that does not get lots of traffic.

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post #15 of 49 (permalink) Old 07-07-2005, 08:54 PM Thread Starter
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Re: Differences in Fuel by company? Texaco, Shell, etc.? Am I nuts?

So if I have a HUGE big rig stop close by thats probably the newest fuel?

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