CTGreybeard wrote:I've seen a delivery truck at Costco and, IIRC, the name on the truck was "Murphy" ... who knows who refined what was inside? Barring concrete evidence to the contrary, I agree that Unbranded would be the best choice.
Partly true. I am sure if you asked the station operators they might disclose a bit more of their source, as it is going to vary across the country. If people locally know their brands, like here for Sam's and Wal-Mart it will most likely be Murphy (I know Wal-Mart is Murphy for sure), then we can brand those stations as such.
My father delivers gas for a living. Each company, be it Phillips, Quik Trip, BP, all have their special blends they will use, hence branding is important. BP and Quik Trip are the most laden detergent fuels in this market. They have the most additives for their fuels, and are quite specific. But one caveat is that no one really grasps in the public, aside from BP and Shell here, all the gas stations share the same source for their fuels. Be it Phillips to 7-Eleven, even potentially Murphy. The pipeline feeds the the reservoirs here, when a load is needed, they take the base 87 octane or 91 octane, and they add their additives to the product to claim it as their own, be it Conoco, Phillips etc. They all have the same source of fuel. I said aside from BP and Shell because they do have their own pipeline in this area (they are more strict on their fuels), but all other fuel companies all use the same source, they just add their own additive.
So for a Costco, which it even says on their website,
Costco buys fuel from major refineries and distributors in each area. All Costco gasoline is fully guaranteed, just like the merchandise we sell inside the warehouse.
 I guess unless you are locally tuned to what they are getting, it would be best served as unbranded.
But for the majority of Wal-Mart and Sam's, Murphy states on their site they serve this area for the most part, it might be different in some other part of the country,
Murphy’s marketing collaboration with Wal-Mart continues to grow at an impressive rate. Presently the number of high-volume retail gasoline stations operating in Wal-Mart parking areas throughout the Southeast and Upper Midwest regions is over 1,000, giving Murphy a unique niche in the U.S. marketplace. Additionally, high-volume sales coupled with very low operating costs giving us a distinct competitive advantage. In 2006 Murphy expanded its operation to include a new full size stand alone C-Store under the Murphy Express name.
Murphy USA Marketing Co. (Murphy Oil USA, Inc.) operates retail gasoline stations under the Murphy USA® brand across 23 states in the U.S. These are high-volume, low-cost retail gasoline stations, primarily in the parking areas of Wal-Mart Supercenters. Murphy Oil USA, Inc. also operates a network of 7 Company-owned terminals (C-Store presumed)
 The majority of these locations could presumably be Murphy.
What I'm trying to express is, the delivery truck isn't going to justify what they have. A Star Transport truck doesn't mean they are using Star oil, or a Groendyke truck doesn't mean they are Groendyke oil. Groendyke operates many trucks that are Quik Trip named on the side through their delivery contracts. But Groendyke, like Star, delivers to any station that is needing fuel dropped. Casey's runs a small fleet for their fuel, for the most part, they will deliver their fuel, except I have seen that Star and Groendyke fill in where needed. Casey's has their own brand of fuel because of their blend, just like Quik Trip and Phillips. They all rely on the same pipelines that feed this area, they just get different mixes at the time of filling the delivery truck.
Shell and BP are more strict about their pipeline and deliveries, so you'll see their own delivery vehicles, much like you'd see branded Love's. I wouldn't get to hastefully wanting to delete a brand without knowing a bit more about the source. For the case of Costco, after researching and reading their site, I can agree that we use unbranded except if there is local knowledge to the contrary. I just fear that some are going to edit the branding based on the delivery truck.
The one I am having difficulty figuring out around here at the moment is Road Star stations. All the others, aside from Costco, are pretty well laid out on their brands.
I was getting ready to post and skapur posted, and you're right, they are all placed in reservoirs, but the company that sells the oil, in order to be a Phillips station or to be a 76 or to be 7-Eleven, etc, that brand, in order to sell it as such, they have to have oil that is meeting their franchising requirements, which would be, if it has x additive, they must sell it as that brand with x additive and detergents. The delivering company will do that at the time they fill the truck. So a Star transport truck or whoever shows up, is technically carrying a 7-Eleven approved gas based on the mix of detergents/additives, or whichever brand. BP has some 16 different detergents to be added at the time the truck is filled with the fuel. In order to sell as BP, that has to be met, no matter who delivers it. So a BP station will be branded BP because they are selling, BP approved fuel. The same with any other station, they are selling the approved fuel mix to the company standards.
 Costco Gasoline Q&A
 Murphy Marketing
 Murphy Oil Corp