Which brand of gasoline do you use ?

Yes I know high test, I'm planing a cross country trip and wondered what everybody prefers for fuel , and most importantly WHY ?

I use whichever brand is most likely to be flammable. That's pretty much my sole criterion.

After much scientific investigation by my wife, we use Shell. This is due to the fact that we get credit for $$ off each tank full when we shop at Stop & Shop for groceries. (This is related to the exhaustive study done to determine where we shop for food.)

I shop at the closest gas station, 30 miles AFTER the light comes on.

any station that has recommended octane for the engine.

I heard great things about Shell and Mobil (additives ?)

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The CEO of the company I work for is on the board of a large grocery company that have gas stations in the parking lot. He told me the gas is delivered to each brand of station from the same tankers, at the station the tanker driver pores in the "additive brand". with that said I prefer mobile for techron. however I have also been informed that the filter at the pump is also important, many stations don't change them often enough. you can tell by the rate the gas flows. Costco brags about how they change their filters and I can say first hand their pumps are like NASCAR! Sent from my iPad using Rennlist

I use Shell gasoline for two reasons. First of all, I've heard good things about their additives and how they help keep your engine clean. Secondly, the Shell station is close to my house.

Generally what is most convenient, or if I'm close, Sinclair as I have a CC and get $.10 off per gallon. Personally I think it's like buying a certain brand of milk. My CPA recently switched to cigarettes made with organically grown tobacco. He claims they are not as harmful. He also runs mid grade gas in his car that the manual states "regular grade" saying it runs much better. I say, "whatever"

Chevron in all of my vehicles except my 750 Turbo (it requires aircraft 100LL).

I try to buy gasoline without ethanol, particularly for the 911. It is hard to find, not always convenient, and sometimes more expensive, and so it does not happen every tank. I stick with major brands (generally Shell and Chevron) and newer stations, particularly for the 911. My Jetta once needed major repair after getting a tank full of sediment from an older station that sold gas very cheap. They paid the bill eventually, but lesson learned. One other obvious tip that bears repeating - do not get gas when the tanker is at the station. If the tanks have any sediment it will get stirred up and much more likely to enter your fuel system. Finally, apps like Gas Buddy and Gas Guru are awesome, particularly when traveling!

Shell V-power 91 always, although it is bloody expensive. In Canada, it has no ethanol in it. I don't believe you are so lucky south of the border.

I wish we could easily find gas without ethanol, but it seems to be everywhere. E10 is bad enough, but E15 will be worse if we get it. It compromises performance and gas mileage and it's not really "green" as some would have you believe. Many studies seem to indicate that it will damage the engine in many cars and other small engines like those used for lawnmowers. According to the EPA, the list of cars that can supposedly use E15 without damage is small, but fortunately some of our cars are on the list: - Porsches from the 2001 model-year and later - Subarus from the 2001 model-year and later - GM vehicles from the 2012 model-year and later - Ford vehicles from the 2013 model-year and later It will be interesting to see how it goes.

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Thanks for your thoughtful reply

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I've driven half way cross country more than once I and I just stick to the top tier gas stations: Shell, Chevron, Union 76, Phillips 66, and others. A list is here: http://www.toptiergas.com/retailers.html Why? Read the info at the link. Last I heard/read Porsche certifies its engines using Chevron here in the USA. But any top tier gasoline should be ok. Porsche does say in the owners manual something to the effect if the engine reacts unfavorably to the a gasoline to switch brands. More likely the gasoline is not wrong for the engine just stale and switching brands has you buying fresher gasoline.

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i like this

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i like this one also

myself....i do not know what brand of gas i get ........it is the closest to me and the guy lets me put the gas in [hi test]......do not care how much or what power boosters/cleaners/magic beans are in it

Costco!

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Sounds famliar... if I had a $ for every hour my wife spent "researching" the mundane, I'd own a GT3...

What would be better - 90 octane w/o ethanol or 93 octane with ethanol?

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93 octane. Always whenever possible use the octane grade called for by Porsche or as close as you can get to it but never any lower than the minimum called for by Porsche. While I loathe ethanol as much as anyone I would never run 90 octane gasoline when 93 is called for just to avoid ethanol in the 93 octane gasoline.

I absolutely agree with Macster on this one. 93 Octane, regardless of the presence of 10% Ethanol. Some places do not sell 93. 91 is the highest available in some states (usually having something to do with altitudes way above sea level). I prefer Shell, Chevron, Mobile, because they have Techron, regardless of whether it is added at the depot or at the station. And my usual snide remark, " If you are worried about a few cents difference in the price of premium gas, you are totally driving the wrong brand of automobile."

91 is the highest octane that I can buy. My choices are: 85, 87 or 91.

^^^ Exactly my point about some states being way above sea level...

I'm at sea level (San Diego). No 93 here, either, that I can find. 91 only. The owner's manual says that the car's computer adjusts to 91.

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An engine's octane requirement goes down with altitude so in some areas 91 or even 90 octane is all that is available. (However, an engine's octane requirement goes up with miles...) 'course, in CA 91 is all there is though a few scattered stations do sell, so I've heard/read, higher than 91 octane gasoline. There are stations offering racing gasoline too but really but all for special events 91 is all there is here.

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It does adjust. Dialing back timing when the lower octane gasoline causes the early signs of detonation. This is preferable to letting detonation happen, but it is not without some costs. The engine is less efficient. That high compression coupled with the ability to start the burning of the mixture soon enough really pays back with improved rpm/low speed tractability. When timing is dialed back the power stroke starts later and less force from the burning of the fuel is converted into usable power. Fuel consumption goes up. Tractability goes down. Another negative is with the delayed ignition timing the mixture burns later in the power stroke and the heat generated subjects all items exposed to the exhaust gases to higher temperatures. What I do not understand with California's supposed laser focus on emissions it does not require gasoline refiners to make 93 octane so engines that run best, most efficiently, with 93 octane can do so.

Well, a rather lengthy reply, but here's the scoop: Source: http://www.smokinvette.com/corvettef...ad.php?p=20354

I agree with rpm's S2. We also have an Audi and the mechanic at the dealership told us to stop using Costco gas or any other cheap-non-name brand gas because of build-up in the fuel injection system. He said you need to use cheapo gas to add a bottle off techron. We use Chevron.

Not true. All fuel pumps and fuel delivery systems have filters. I have MANY gas stations as clients (ARCO, Shell, ConocoPhillips, and others). They all confirm that the worry over sediment stirred up during fuel delivery is a myth.

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Yes, this. Gasoline is a fungible commodity with little attention paid to actual source. The major pipelines are all shared by various producers, too, and the gasoline a company takes out from that pipeline is not the same gasoline it pumps in, just the same quantity. Hence, the actual gas you get from the pump is pretty much the same regardless of what station you get it from. So, that Texaco station may very well be filled with gasoline produced Venezuelan gas, and the Citgo next door might have Texas gas in it. The only real difference at the pump are the detergent additives they put in and who's getting your money. I buy my gas from whoever is cheapest/most convenient without concern for if they make some website's "Top Tier" list. Ethanol is an octane booster and detergent and 10% is not necessarily something to go out of your way to avoid. I do worry about the cheapest of the cheap with respect to filtration and water in the gas, etc., though I've never had any problems with them.