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> What grade gas do you use?, In your teener
Gas Grades
What grade gas do you usually put in your teener?
Regular (85-87) [ 65 ] ** [31.71%]
Plus (88-90) [ 21 ] ** [10.24%]
Premium (91+) [ 117 ] ** [57.07%]
Doesn't matter [ 2 ] ** [0.98%]
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BahnBrenner914
post Jul 11 2007, 01:52 PM
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The girl is gone and all I have now is a beat-up teener
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Just wondering what you guys use as I'm putting my tank back in and it says 91, but how important is that?
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Joe Ricard
post Jul 11 2007, 02:19 PM
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as low as you can go without ping.
I ran 87 in my car 7.8:1 compression Ran better than when I used 89. was an absolute dog on 91.
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newto914s
post Jul 11 2007, 02:45 PM
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the sticker in the tank is 91 Ron(Germain Standard I think) and when it's converted to Octane, how we measure our fuel in the US, it equals 87 Octane.
Joe's right, lowest Octane the car won't ping with, everything more leaves carbon behind when it doesn't completely burn.
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Johny Blackstain
post Jul 11 2007, 02:53 PM
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QUOTE(newto914s @ Jul 11 2007, 04:45 PM) *

the sticker in the tank is 91 Ron(Germain Standard I think) and when it's converted to Octane, how we measure our fuel in the US, it equals 87 Octane.
Joe's right, lowest Octane the car won't ping with, everything more leaves carbon behind when it doesn't completely burn.

I'm not sure but I think it converts to 89, not 87. Teeners ran on regular, "89 octane leaded gas" back then which is equivelant to mid/plus/89 today. I could be wrong on this since I've done no math but it makes the most sense to me.


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Joe Ricard
post Jul 11 2007, 03:39 PM
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Sense or not. I used what worked for me.
my new motor will be a whole new learning experience with octane.
10.4:1 compression
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Gustl
post Jul 11 2007, 04:05 PM
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the sticker says 91 - so I use 91

btw - our gas stations offer 91, 95, 98 and some of them even 100 ...

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914nerd
post Jul 11 2007, 04:25 PM
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Who you callin' a "Member"?
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That's because the RON (research octane number) is higher than the R + N / 2 that the US uses
I think it translates to low grade fuel
Run as low as you can without pinging
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PeeGreen 914
post Jul 11 2007, 06:15 PM
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I've been running 110 leaded the past year, and my car gas more snap than ever. When the engine was apart it looked very clean as well.
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Johny Blackstain
post Jul 11 2007, 06:25 PM
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QUOTE(Blood red 914-6gt @ Jul 11 2007, 08:15 PM) *

I've been running 110 leaded the past year, and my car gas more snap than ever. When the engine was apart it looked very clean as well.

Where may I ask, can you get 110 leaded? Must be $15.00/gal!


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newto914s
post Jul 11 2007, 06:42 PM
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QUOTE
In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States, Canada and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, would be 91-92 in Europe. However most European pumps deliver 95 (RON) as "regular", equivalent to 90-91 US (R+M)/2, and even deliver 98 (RON) or 100 (RON).

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PeeGreen 914
post Jul 11 2007, 06:43 PM
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A few stations here carry it. YOu have to bring cans to put it in as they cannot pump into your car. I have 5 five gallon cans I fill up when I need. It is 6.25 a gallon. The 100 unleaded is 12.00 a gallon.
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IronHillRestorations
post Jul 11 2007, 06:46 PM
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Joe's right on. We had a petroleum tech do a presentation at the Mid West Renegade Festival back in '96 and he said the same as Joe.
People started calling high octane "high test", which makes you think it's better right? Maybe for an old 327 Chevy with 12/1 compression.

The higher the octane the slower the burn. The higher octane, the more additives the fuel has in it, which ends up on the top of your piston and on you cylinder head. The more carbon build up you get means it raises the compression and you get carbon hot spots on the piston or cylinder head which results in pre-ignition, so you run higher octane fuel and the endless cycle continues.
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orthobiz
post Jul 11 2007, 06:54 PM
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QUOTE(9146986 @ Jul 11 2007, 08:46 PM) *

Joe's right on. We had a petroleum tech do a presentation at the Mid West Renegade Festival back in '96 and he said the same as Joe.


Say it ain't so, Joe! My new car is "poppy" with my foot off the accelerator while in gear and maybe it would run better on LOWER octane?? This I gotta try! Thanks,

Paul
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SLITS
post Jul 11 2007, 07:07 PM
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Cheapest shit I can find!
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orthobiz
post Jul 11 2007, 08:38 PM
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QUOTE(SLITS @ Jul 11 2007, 09:07 PM) *

Cheapest shit I can find!


Hmm... Wonder if it's as harsh as the Utah shit that Gumby likes so much!

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familienauto
post Jul 11 2007, 09:50 PM
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We put 92 octane in ours. Previous owner said he put 87 octane in it once and it knocked real bad, so we just put premium in it.

Zach
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D1A3
post Jul 11 2007, 10:08 PM
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Check out my previous post on this:

http://www.914world.com/bbs2/index.php?sho...mp;#entry805978

Porsche recomends ROZ91 whcih translates to 87 here in the US. No need for anything more than that unless your running something modified.

BTW: I always hear I have a fast 914 and am asked what mods have been done. I use 87 here in the US and think a properly maintianed engine and decent driving skills are way better than paying for the higher grade fuel unnecessarily. Save your money and put it into other areas of the car.
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grantsfo
post Jul 11 2007, 10:15 PM
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Arrrrhhhh!
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110 leaded race gas
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IronHillRestorations
post Jul 12 2007, 08:24 AM
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[[/quote]

Say it ain't so, Joe! My new car is "poppy" with my foot off the accelerator while in gear and maybe it would run better on LOWER octane?? This I gotta try! Thanks,

Paul
[/quote]


I would say that doesn't have anything to do with the fuel. Sounds like an exhaust leak to me.
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shelby/914
post Jul 12 2007, 09:05 AM
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My '76 2.0L with FI runs just fine on 85 octane, which is regular at our altitude. It is also what my independent Porsche shop recommended.
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