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924/931/944/951/968 Forum Porsche 924, 924S, 931, 944, 944S, 944S2, 951, and 968 discussion, how-to guides, and technical help. (1976-1995)
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View Poll Results: What grade gasoline do you use in your 924/44/68?
Regular/ 87
24.00%
Mid-grade/ 89
8.00%
Premium/ 91 (or higher)
68.00%
Voters: 100. You may not vote on this poll

What grade gasoline do you use in your 944??

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Old 02-29-2012 | 02:51 PM
  #46  
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Originally Posted by Giantviper
+1 I also once ran my '88 on regular and it did not run the same. I usually use premium.
The 88 is 10.2:1 and needs 91. The 83-87 9.5:1 use 87 Oct.

The 944S, 951, 944S2, 968 all need 91 minimum.
Old 02-29-2012 | 04:02 PM
  #47  
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Haha......I love how if you say "some", then everyone that it does not apply to get offended.

If you are running the right fuel for your car then you are fine. It's those that are cheating out buy buying the cheapest fuel possible that also tend to neglect the car in other ways.

Just saying this is an example of that. (not saying everyone in the thread is doing it)
Old 02-29-2012 | 04:36 PM
  #48  
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my car does pretty good. fuel, oil and air filters are more important than my celphone bill.

my 968 engine is like a straight six.... it will make power until it locks up.... regardless of what gas i run.


anyway i heard the ethanol they've been putting in the gas actually causes the gasoline to go up a couple of points....



High Octane Gas Myth

by Jim ****

I know a lot of people who believe that higher octane gas is better for your car than lower octane gas, as if the words premium next to the higher ratings actually mean the gasoline is better for your car. It isn’t. If you believe it is, don’t be dismayed, you’ve simply become accustomed to reading the words “premium” next to the label and believing the great marketing machine that helped create over $10B in 4th quarter profits for companies like Exxon-Mobil. The octane rating of gasoline is a measure of how much you can compress the gasoline before it ignites, not how “good” it is.

Cars that require higher octane gas actually need that higher priced gas because the engines compress the fuel more before it ignites it. If you put regular gas in a car that requires premium, the gas will prematurely ignite when it’s being compressed and the engine will give you a knocking sound. This is bad for your car.

Chemists perk up… For all you burgeoning chemists, gasoline is basically octane and heptane, or hydrocarbon chains that are 8 (octane) or 7 (heptane) carbons long. Octane simply can be compressed better (i.e. without the exploding part, at least at the same levels of pressure) than heptane. An octane rating of 87 means it’s 87% octane.

It’s a “rating”… The reason why higher octane is more expensive is because it’s harder to refine the gasoline so that it contains more octane. Now let’s add another wrinkle… the octane is actually an octane rating, or it behaves as gasoline with that percentage octane would behave but might not actually have that much octane in it. While that doesn’t really matter, it does mean that the gasoline you use could have a mix of other things in it (still real gas though) to give it properties of a higher octane without actually having more octane....



anyway, i've reached 163 mph running a mix of regular and plus......
Old 02-29-2012 | 06:02 PM
  #49  
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stop being cheap
Old 02-29-2012 | 06:13 PM
  #50  
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i use 98 for long trips and 100+ for "performance driving"....i live in europe...i'll try E85 this year after i change the 1.5m rubber fuel lines to E85 friendly.
read "performance driving" as when i want to feel cool/scared flooring my turbo 924
Old 02-29-2012 | 08:00 PM
  #51  
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We run E85 in our NA 924S and NA 944 race cars
Old 02-29-2012 | 08:07 PM
  #52  
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Originally Posted by Cole
Haha......I love how if you say "some", then everyone that it does not apply to get offended.

If you are running the right fuel for your car then you are fine. It's those that are cheating out buy buying the cheapest fuel possible that also tend to neglect the car in other ways.

Just saying this is an example of that. (not saying everyone in the thread is doing it)
I run 87 octane in my turbo, use Super Tech motor oil and FRAM filters.

Old 02-29-2012 | 10:41 PM
  #53  
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Originally Posted by V2Rocket_aka944
the sticker on my gas filler says 86. so 87 it is. i have run 87, 89, 91 and 100 octane unleaded in my car and there is absolutely no difference in driving or power, even in the hot summers of the socal desert.

and while the brand may be premium, our cars certainly are not. a 951 needs premium gas because of the cylinder pressures, not because it is an "expensive" car. there is nothing mechanically significant or "exotic" about a 944 NA engine that would warrant high-fallutin gasoline/oil.

oil changes has been 20W50 pennzoil dinosaur blood every 3 months, regardless of mileage, since the engine rebuild in 2006.

today i am changing out my 30,000 mile Zims waterpump and all belts and rollers, just because i heard a noise from the front of the motor.

don't confuse being cheap with being realistic.
+944

Amen, brother!
Old 02-29-2012 | 10:41 PM
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Originally Posted by Cole
Haha......I love how if you say "some", then everyone that it does not apply to get offended.

If you are running the right fuel for your car then you are fine. It's those that are cheating out buy buying the cheapest fuel possible that also tend to neglect the car in other ways.

Just saying this is an example of that. (not saying everyone in the thread is doing it)
...and what kind of engineer are you?
Old 03-02-2012 | 12:39 AM
  #55  
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Looks like this poll thread is played out...

In any case, just put in 10 gallons of Shell V-Power 93 for $3.83/gal.
(always leave 5 gallons left in the tank)

Valero 93 is $3.73 so an extra dollar for 38 bucks Shell "top-tier"gas seems worth it..

Is Virginia's $3.83 pretty reasonable compared to other states this week?
Cheers mikey
Old 03-02-2012 | 12:44 AM
  #56  
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yep.... leaving space in the tank is an hp and performance increase right there.
Old 03-02-2012 | 12:45 AM
  #57  
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$3.90 for 87 last week in Phoenix. Only going up, still!
Old 03-02-2012 | 12:48 AM
  #58  
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$1.65 when Obo took office.....$3.35 in OKC today

Hope and Chump Change 2012
Old 03-02-2012 | 12:54 AM
  #59  
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Lowest I've experienced since last June was $3.20...
Old 03-02-2012 | 01:15 AM
  #60  
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Originally Posted by robstah
300rwhp @ 87 octane.
500rwhp @ 100 octane.


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