gasolines

[brett25]

hehehe. Hi all. im curious what gasoline brands you guys are using. and if, by chance, there maybe a sort of consensus out there as to a particularly well suited formula for the 944. or, even, if this is a poor excuse for a topic and i should be spending my timein better ways. anyway, im using 76 now, because my previous owner used it and said the car ran well with it. i am using techron now and again as well. thanx
Brett

[Nabeel]

I use Shell 93 octane all the time, and the car runs great. I once put Super America gas in the car about 2 months ago and there was quite a noticable difference in the engine behavior. It seemed a bit rougher, and the engine occasionally used to shudder when I turned the car off. I guess my car is used to Shell.

[Brian J]

I use anybody's 89 octane. My 944 NA runs well on any brand. However, I do notice slower performance with less than 89 octane.

[rscupper]

Hey Brett - 93 octane in Kentucky. Don't you wish we could get that?

[brett25]

Hi rscupper. yea, but i cant imagine what they'd charge us for that juice! i just ordered a performance chip which is supposed to need 92 octane fuel. i dont know if i can find even that out here. although the guy i bought it from said that 91 octane should be OK.
Brett

[TKenton]

93 octane BP Super here in KY in my 944S and it runs like a champ. I also run some techron thru it on occasion.

[Leigh 13]

I have always used Regular (87) in my '83 944 N/A with great results. I pay little attention to the brand, and usually go with whatever is cheapest on and on the way to where I'm going, so long as it's a major brand...Exxon/Mobil, Shell, Texaco, Amoco, Hess--no "Mr. Gas" or Gaseteria, thank you!

- Leigh

[Rollins]

I generally switched it up a little bit. I've heard that using fuel with a really high octane could leave carbon deposits, and I didn't want that. So I ran 89 regularly for a while and then I switched to 91 for a while, and back down to 89. I never noticed any problems with this setup, and I didn't relaly notice anything during the transitions between the two. I did notice a difference when I was running 87.

[seb928s]

I use 93 octane from Mobil always. I use everything Mobil in my car anyways just keeping it the same. I have notice that it get little better gas mileage then other gas station. But it runs great on it.

[rscupper]

My believe 944 manual says 'minimum 91 octane' (I'll double check upon request). That's the max available to me in California, thanks to the heartless wonks at CARB!. Why would I go lower than what the Porsche engineers recommend? I tend to stick to major brands, only because I have their credit cards for convenience and the price difference is only about .02/gal locally (also, nicer restrooms when needed). If I were to use unbranded fuel, I would check the fuel filter more often - no big deal.

I threw away my 911 manual. 10.9:1 compression ratio/Weber 46IDA carbs/tweeky cams = hi rpm's. Hi rpm's + 91 octane fuel = DETONATION (~$17K). So, I mix about 3:1 of 91 octane to 104 octane to prevent detonation at >6,500 rpm. Yes, I can get the 'super' locally for about $4.50/gal. I wouldn't do a canyon without it.

Cheers

[Leigh 13]

Brian,

The 91 octane recommended in the 944 manual is on the European scale. It translates to 87 octane in the USA.

- Leigh

[scottmandue]

I always run Chevron super because it has techron in it, have not had any problems for about eight years (previously own ford fuel injected engine included)

[944S Boyeee]

You all do realize that this whole "octane" thing is a huge farce!! There is absolutely no difference between any gas other than the price. Anyone out there ever measure the octane in your gas lately?

It's like "Extra Creamy Kraft Dinner". It's not actually "Extra Creamy" - they just charge you more money for the exact same box that you normally buy, but the "Extra Creamy" box weighs less. Basically they pull like 20 grams of noodles out of the box, put in the same size cheese packet and it becomes "Extra Creamy" - did ya all know that??

Also, MacDonald Hamburgers are like 50% soy. When you see the wrapper that say's "100% Beef" - that is actually the name of the company that supplies MacDonald's with it's Hamburger. The "100% Beef Meat Company" makes those Beef/Filler/Soy patties.

......oh, and by the way - there never has been a man on the moon.

Weeeeeeeeeeeeeeeeeeeeeeee!!!!

But seriously - you can believe every/anything you see. At least that is what I think. I don't believe ANYTHING until it's proven to me in front of my eyes at least three times from all angles.

I'm just nuts!!!

[rscupper]

Prove it to yourself. Take a couple of chemistry courses so you know what you are researching. Keep accurate research notes for reference. Talk to experts. View it from three sides, if you wish - skepticism is healthy.

I've done all the above to my satisfaction. No, I can't formulate or design fuels. I don't know the/a octane testing protocol. But I do know of MANY racers who have blown engines with >10:1 compression ratios by revving with inadequate octane-rated fuels.

I can afford an extra .10/gal (plus mixing 3:1 w/104 octane @ ~4.50/gal). It's cheap insurance premiums on my $20K engine. It just doesn't make sense to be penny wise and pound foolish

Cheers

[Goku]

944S Boyeee... Have you ever heard of the fallacy Appeal to ignorance? If not ...look it up. And take some logic.

[944S Boyeee]

Sorry Goku - I don't understand what you're saying? Take some logic? Like a class? Or is that some sort-of pill? And what is this fallacy Appeal to ignorance thing? .....and frankly, what does all this have to do with me??

Just curious.

[scottmandue]

Originally posted by 944S Boyeee
Sorry Goku - I don't understand what you're saying? Take some logic? Like a class? Or is that some sort-of pill? And what is this fallacy Appeal to ignorance thing? .....and frankly, what does all this have to do with me??

Just curious.

It means you don't know what you are talking about

[rscupper]

Thanks Leigh, you're absolutely correct. Porsche recommends minimum octane ratings of 91 RON or 87 CLC (US).

Thanks!

[wolfrpi]

To put it bluntly you're acting like a tool 944S Boyee. Sorry - it had to be said and I hate to be the one who said it. Maybe a Honda Civic would be more your speed.

Anyway, as to octane ratings I notice a significant difference between 87 and 91 octane in my 924S. It has the stock chips, but the difference in audible knock and performance is noticeable. Interesting.

[peregrinfalcon]

I use 93 octane from any of the major suppliers. If I'm near a Delta Sonic car wash I'll fill up with 94 (I'm not sure which brand they use) If higher octane is a suckers play well then they got me.