What the gas you use ? And why ?

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Unleaded.

Oops, forgot the second part. Why? Because diesel is more expensive.

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Ditto. But really, any vendor on this list: http://www.toptiergas.com/retailers.html

only the finest hand fed dinosaurs that were laid to rest peacefully 65 million years ago,sprinkled with bred [and breaded] sea creatures .dispensed by naked 25 year old female fuel techs in revealing lab coats.....none of that euro trash north sea swill for the cars of the gods.paid for from gold shavings of ingots ........................or if it aint available .......the gas station closest to me that aint busy .po people beeez strange

Costco... Which I learned today doesn't earn you any cash back on their cash back membership. WTF.

LOL! What in the world? Everybody knows you have to use only German gas, N-rated and only available in the US at your Porsche dealer. Be sure you get the Certified Fuel sticker applied to your car and have your owner's manual stamped by the Porsche dealer. Otherwise, the value of your car will plummet to the lowest value on Carfax and you might as well just drive it to the junkyard.

Castro, can't speak for the normal true earnings amex, but my business amex true earnings gets 2% back upto 2 or4k a year (forget). Although, I use my others when they offer 2% or higher as I prefer the travel rewards. BTW I use Kroger gas and Costco most often, if I can't find those, Shell, BP or Mobil typically do the trick.

My gas, not only is specially refined by Porsche at their Norwegian facility in Lapland (north of the Artic Circle) but when it arrives here on the left coast it is then filtered again through the lace panties of toothless eskimo women. That way, no impurities other than an occasional human hair.

Chevron with Techron 91. Proof came when I took Acura for the t-belt change. Acura recommended plug change interval is 105k miles. My plugs came out looking brand new after sitting in the engine for over 100k miles.

I use Chevron With Techron The highest octane that I can find. My 996 could tell the difference.

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You magnificent bastard.

I use whatever is leftover from the lawnmower. It is full of stabilizer from about 2 years ago so it should be fine. Sometimes I top it up with some additive on special at Harbor Freight.

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A very loaded question. Bound to open up a can, make that two cans, of worms. Here is what I have on the subject. First use the recommended octane, or as close as you can get. If you can get 93 without having to jump through hoops - like blending race gas with pump gas which to me is just not acceptable even if race gas were handy -- use it. If all you can get is 91, if you for instance live in CA like some of us, use 91. Note in some regions, at higher elevations, only 90 is available. I've used this without any concern as the engine's octane requirements go down at higher elevations. Next use a busy station. This has two benefits. One is a busy station probably has the lower prices. Two is a busy station has the freshest gasoline. In some areas I've encountered stations so busy that they get more than one fuel delivery per day. Now comes brand. A very interesting fuel test conducted in the UK some few years ago by EVO magazine found a noted difference in gasoline performance of gasolines bought from "supermarket" stations vs gasoline bought from name brand stations. The explanation was these supermarket stations rely upon offering gasoline at a discount. As a result they seek out the less expensive gasoline stock. What happens then is the quality of the gasoline varies. Thus one can fill up one day and get some pretty good gasoline, maybe indistinguishable from any super duper brand of gasoline. Next fill up may have the engine burning goat ****. As an aside: Why/how the gasoline can vary arises in part from the fact gasoline, like other manufactured fluids, can have some variability. IOWs, all gasolines are *not* the same, at least not identically the same. Another factor is gasoline transport. My info is when gasoline is piped premium fuel is sandwiched between a leading batch of regular and is followed by a trailing batch of regular. There is nothing between these batches. The gasoline is in direct contact. There is I understand surprisingly little intermingling of the leading batch of regular and premium and the trailing batch of regular and premium, but there is some. At the destination as the fuel is removed from the pipeline it is unlikely the portion of the premium that is possibly "contaminated" with the regular is going to be directed to the regular holding tanks. Instead this fuel will be directed to a special holding tank. The purest portion of premium will be directed of course to the premium holding tanks. The distributor will I'm sure add the enough "pure" premium to the contaminated holding tank of premium to the point the fuel in the tank meets the minimum requirements for premium, but it may not be the equal of the purer premium that was taken from the sweet spot of the batch of premium gasoline transferred through the pipeline. This less than premium premium could very well be offered at a discount to the discount gasoline stations. As for gasoline differences, there is my experience with my Boxster. For a couple of years I mainly used a discount gasoline bought from a nearby and very handy station. Since I drive a lot and fuel up a lot handy is an important feature a gas station has to have. Also, its price for premium was a few pennies less per gallon than name brand gasoline which given the number of miles I drive and the amount of gas I use over a year's time nothing to sneeze at. Then I moved. I ended up close to a Shell station that 1) was busy; 2) had very competitive prices; 3) and was very very handy, convenient. Granted this station's price of premium gasoline was not as low as the discount brand of gasoline I had been using, but close enough that it would have not been worth it to drive out of my way to shop at the discount gasoline station. What I found with the change from discount gasoline to in this case Shell gasoline was a persistent converter error (CEL with a diagnostic code that pointed to an under performing converter) appeared less often using the Shell gasoline. This even though my usage of the car remained unchanged and over a span of time that eliminated weather as a factor. I knew then, or strongly suspected it, the converter "brick" was loose to the point it buzzed (later it knocked when cold). This made the converter I guess more sensitive to combustion efficiency. Apparently combustion was less than satisfactory with discount gasoline, while combustion efficiency was better with (in this case) Shell gasoline to the point the converter's performance was improved enough to reduce the frequency of the CEL. After the switch to (mostly) Shell, the CEL didn't go away entirely, but it occurred much less often that I was confident the difference was the gasoline. Back to the fuel test: The fuel test found name brand gasolines to consistently be the best. But even once in a while a name brand gasoline was found to be subpar. This was attributed to staleness. Hence the recommendation to use a busy station. So, what I have settled on is using a name brand gasoline: Shell comes up first because in my area there is a very convenient Shell station that has its price a bit lower than other stations nearby which include Chevron, 76 and Circle K, and a block or so away a Safeway supermarket station. Now it just so happens the Shell station is closest to the Safeway supermarket gas station and the people at the Shell station tell me they set their prices to try to be competitive to the prices offered at the Safeway station. Thus by shopping at the Shell station I in some way benefit from the proximity of the discount Safeway gasoline station and its lower prices. There is another Shell station downtown and its prices are even lower but it is inconvenient to get to and I seldom fill up there unless I happen to be in the area. Away from home to where I need to fill up on the road I'll use Shell, Chevron, 76, or Phillips 66. I have not used BP, or Sunco, or other brands as in my travels I haven't encountered these stations. The EVO fuel test also tested a race gasoline. Testing found this race gasoline really delivered the goods on the track when used under track conditions. Thus I would add that if one is going to track his car to fill up with as much race gasoline as possible. Hang that business of trying to blend street pump gasoline with race gasoline to get "93" octane. Just dump in as much race gas as there is room for. Ideally one would want to arrange the fuel level in the tank to be low so there is very little pump gasoline present to dilute the race gasoline. Do this to not only ensure there is sufficient octane -- sure there'll be an excess which won't have any benefit -- but to derive as much of the other benefits offered by race gasoline. In short there is more to race gas than its elevated octane rating. Take advantage of this. You can continue to publicly tout the blending of race gas to street gas to get that optimum 93 octane to your "competitors" while secretly filling up your car's gas tank with as much race fuel as possible. Give yourself an edge...

^^^Wow.

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I see what you did there

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wowwie wow the guy really needs to get a job as a pizza delivery boy......he could tell his life story/advise to many

I use the best gas the station I'm at has. Be it 90 or 94, Same for my motor bikes ,not to **** about it, for my truck I use the cheapest.

^^^^ Tolstoy owns a 996

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Whizzy Chocolate Assortment?

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Thank you for the thoughtful and informative Reply

Sunoco is only for brand vehicles who participate in Nascar (Toyota, Chevrolet, Ford, Dodge); Zanzibar red 996, you're killing your engine slowly but surely, the recommended gas for Porches is Mobil 91-93 Octanes. Formulated to meet the demands of some of today’s most advanced engines, it generally has an octane level of 93 but is blended with an octane level of 91 or 92 in certain areas of the U.S. To find out if your vehicle would benefit from higher-octane gasoline, check your owner’s manual. Some others prefer to use the new Joe Gibbs gasoline, from his football couching experience and been a Nascar team owner as a savvy entrepreneur he decided what is best for Porsche (he did not graduate with a tittle as a development, manufacturer or any branch of engineering title). Porsche engineers have no clue about what is best for your Porsche, Joe does. So Zanzibar red 996, Bruce Jenner is developing a new combination of oil and gas specifically design for 996, he is well recognized as a successful race car driver in the IMSA Camel GT series (International Motor Sports Association) in the 1980s. His first victory came in the 1986 12 hours of Sebring in the IMSA GTO class driving the 7-Eleven Roush Racing Ford Mustang with co-driver Scott Pruett, not only winning their class but finishing 4th overall in the 12-hour endurance race. His most successful year was also 1986, when he finished second in the championship to Pruett. Who are you going to trust? A Nerd German engineer who says what is best for your car, maintenance, recommended parts, etc and never race or own a racing team o have no clue about football or an American sports Celebrity?

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People at the office had to come to my cube to find out why I was laughing so hard.....ROTFL.....

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I use a Chase card that usually offers 5% cash back on gasoline about 3-6 months every year. Other times 1-2%. I switch between this and an Amex business card which I like, but I was disappointed (though I suppose not really that surprised) to learn that Costco excluded gas purchases on their cash back membership. If I can't get to Costco I'll usually try to do a Sunoco, Shell, or Mobil. BP if I can't find any of the above, but I've been told by more than a few techs that some detergent/additive in BP was "bad." They didn't elaborate. There's no shortage of opinions on these cars!

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This guy that wants to become a woman?

1) Shell - highest octane available - for Porsche. +1 on choosing busy station. I gas up when I'm in DFW's fancier neighborhoods! I assume more frequent turn over of premium. 2) Kroger cheapo gas - wife's beater truck - get 10 cents/gal for every $100 bucks in groceries. Several times per year they offer 4x Fuel Points if you buy gift cards. Wife then buys scads of Shell gift cards for me! Hakuna Matata, The Gasoline Circle of Life is Closed. T

I generally use whatever gas is closest to home. Premium. Unleaded. There is also a station that sells r / a / c / e gas I use it when I'm feeling racy but it costs more than a hummer and a bag of junk. *drops mike*

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I'll say!!! Macster, you have outdone yourself! Me: ARCO AM/PM. It's usually the cheapest. Gotta save those pennies where you can.

Cheapest.

Combination of a Top Tier vendor and a high customer volume. Although this is difficult to determine as most people out there are just putting unleaded-lowest grade in their cars

A top-tier fuel, such as Texaco, Sunoco or Mobil. I had two misfires after a tank of Chevron from the Florida turnpike. I was Not amused.

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We don't have any of those brands in CA. Only gas I've experienced trouble with is Costco. Which is probably variable sometimes good sometimes dicey. But for my performance cars I chose the best gas available which for us in CA is shell, 76 and chevron. Haven't had any issues with these brands.

So is there a correlation between N rated tires, top tier gas, top branded oil, porsche coolant? If someone used top tier gas but non N rated tires, would that be equivalent to seeing a Ferrari with Nankyang "s" rated tires on it with cheap rims and unpainted body kit? Hmmm.....

Just watch for where the Smart Fortwos fuel up - those a$$hats have to put premium in their sh!tboxes, so at least you know the tank's getting turned over occasionally. "Yes, I _did_ spend $14K on a completely useless vehicle that only gets 40MPG and requires premium, but the absolute shame of that purchase is eclipsed by the fact that I haven't gotten laid in 28 months, likely due at least in part to the fact that I'm a grown man driving something only a vegan cheerleader should own."

I use Vons/Safeway and get a .10/gal discount for every $100 of groceries. Their cash/debit price is almost always the lowest to start with Also Costco. Costco gas is high quality and they do a HUGE volume, so it is always fresh. Same with my local Vons I only see 91 in San Diego and So Cal. A few places have 100, but is is stupidly expensive.

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Well, it is a question that has intrigued me and one I have whenever possible tried to gather info on so I can make a more informed decision. I used to subscribe to the gasoline is gasoline line of thinking but as I dug into this more I found that there are differences. In my personal experience enough to noticeably affect the engine. I like to save money as much as the next guy, but I really don't feel that I'm truly saving money by buying -- to me based on what I've learned -- a sub-par or substandard gasoline even if it is of the proper octane grade and fresh. ARCO is to me a particularly lousy place to buy gasoline. It is either cash or a debit card. I used the cash feature once and got the money assigned the wrong pump. I was unable to move the car to get it to the right pump, so I had to dash in and get a refund which was tough as the clerk thought I was scamming him. I do not use a debit card for any purchases. I like the quickness and ease of buying at the pump with a credit card -- plus I get cash rewards -- so I stopped shopping at ARCO almost before I started.

Most Arcos let you use a credit card now although I believe that they add a surcharge, which may make the price difference compared to other places insignificant. I gas up when I need to and every once in a while dump a bottle of Techron in the tank.

A friend of mine owns several gas stations and a gasoline distribution business. One of his customers is Costco. He told me that the gasoline at the different stations is exactly the same, and he picks it up from the same source. However, there are less of various additives in the Costco gas. Apparently, the additives are added at the distribution facilities where the trucks are filled, rather than at the refineries. I never use a debit card, cash only for gas. I find ARCO the easiest, since it has the pay kiosks. It seems to me that if cars were dropping like flies from using ARCO gas, that would make front page news. Another friend of mine suggests dumping a bottle of Techron in every once in awhile. I don't know.... can't say I've ever noticed a difference from one brand to another. But, I've never filled up at one brand, and then another, and driven through both tanks in such a similar manner that I would be able to objectively notice a difference.

I use a local Chevron station, for a number of reasons. It's always busy, the price is good and lastly , Techron. When I was working(hello retirement), I drove 40,000 a year. My cars never had anything other than minor problems, water pump,clutch,etc . One car went north of 250,000 miles ,another well past 180,000 miles before I gave it to my nephew and it's still going strong. Alan

Sam's has the premium gas our cars are tuned for, is the cheapest i've seen in the city of Dallas (is likely cheaper where real estate is cheaper where no one wants to live--like the burbs) and you get a $.05 discount with a Sam's card. The drawback is they don't take American Express. Membership does not have it's privileges at Sam's. ---for those of you that are under middle age it is a reference to an old Amex campaign.