View Poll Results: What grade gasoline do you use in your 924/44/68?
Voters: 100. You may not vote on this poll
What grade gasoline do you use in your 944??
02-29-2012, 03:12 AM
#31
Instructor
Good God that is a sweet *** in that pic above! http://youtu.be/Mon1FUXnGCo
Anyways, back on subject. My gas lid also says 91 Octane. Well, since Washington doesn't seem to sell 91 octane, but rather 89 then 92, I always use 92
Anyways, back on subject. My gas lid also says 91 Octane. Well, since Washington doesn't seem to sell 91 octane, but rather 89 then 92, I always use 92
02-29-2012, 03:40 AM
#32
Instructor
I always ran 91 in my '86 NA (since I didn't think it had any type of knock-sensor). In my 968, I also run 91. I use Chevron always and never CostCo. My non-Porsche (a Lincoln) ALWAYS pings on CostCo but not Chevron...
02-29-2012, 08:39 AM
#33
Three Wheelin'
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I run 87 once I realized the compression on the n/a is not all that high. Back in the day when I was running a 10.5:1 engine, I ran sunoco 94 only, with a bottle of octane boost for track days, as I would advance the spark slightly. Ohhh how the sound of triple weber carbs singing at 8k rpm will make the hair on the back of your neck stand up!! ..ah darn..I wet my keyboard....
02-29-2012, 08:46 AM
#34
Rennlist Member
i use 89 octane in my 944. seems to run a little smoother on 89 vs 87. maybe its just my imagination, but it seems to. no use in running 94 though.
02-29-2012, 10:28 AM
#35
Administrator - "Tyson"
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This poll would make more sense if broken down by model.
In a bone stock 8V I would have no problem using 87 for daily use. In my S, no way. 93 only.
I'm hoping to dust off the S this spring and start putting it back together. I plan on building it for E85 and everything in between using a fuel sensor.
In a bone stock 8V I would have no problem using 87 for daily use. In my S, no way. 93 only.
I'm hoping to dust off the S this spring and start putting it back together. I plan on building it for E85 and everything in between using a fuel sensor.
02-29-2012, 10:56 AM
#36
Pro
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I just go with the premium. Not for the 006/1,000,000 parts iso-octane, but for the additive packages that are in the companies premium blends.
The additives are expensive of course, but I believe there is a higher level of quality control during the blending. While I am an oil and gas engineer, I am not a refining engineer , nor to I pretend to be. But I have distilled this down so to say from buddies of mine who are in refining and formulating.
The addition of ethanol only increases my idea of the additives, although ethanol is one of the additives of course, and does add to the anti knock properties of the gas.
Many of the "base" gas is the same - or can be different. Shell can have Conoco base gas. Chevron may have Shell. They just swap and sell it to each other based on demand and logistics. What makes the gas different is additive packages.
What you can do , if you want to really get the best from the gasolines and additives is to switch around to get the best from the respective deposit removal additives. I for instance use Shell and Chevron. Maybe a few months with one then the other.
And older engines might need a bit more octane too - especially when they are under higher loads - like a 951 might be at times.
The additives are expensive of course, but I believe there is a higher level of quality control during the blending. While I am an oil and gas engineer, I am not a refining engineer , nor to I pretend to be. But I have distilled this down so to say from buddies of mine who are in refining and formulating.
The addition of ethanol only increases my idea of the additives, although ethanol is one of the additives of course, and does add to the anti knock properties of the gas.
Many of the "base" gas is the same - or can be different. Shell can have Conoco base gas. Chevron may have Shell. They just swap and sell it to each other based on demand and logistics. What makes the gas different is additive packages.
What you can do , if you want to really get the best from the gasolines and additives is to switch around to get the best from the respective deposit removal additives. I for instance use Shell and Chevron. Maybe a few months with one then the other.
And older engines might need a bit more octane too - especially when they are under higher loads
- like a 951 might be at times.
02-29-2012, 12:08 PM
#37
Race Director
87 when I had a 944 street car
91 in my Turbo S and 91 in my 944 race car. I don't put less into my race car, because it gets driven hard. (alot harder than any street car, with full throttle 90% of the time and never any operation below 3000 rpm and all shifts at 6k to 6200 rpm).
91 in my Turbo S and 91 in my 944 race car. I don't put less into my race car, because it gets driven hard. (alot harder than any street car, with full throttle 90% of the time and never any operation below 3000 rpm and all shifts at 6k to 6200 rpm).
02-29-2012, 12:34 PM
#38
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Gas is the cheapest thing you will ever put in these cars... if you have a high compression motor run premium... turbo , run premium... I personally always use shell 93 in my S2... But I drive full out a lot
02-29-2012, 12:38 PM
#39
Burning Brakes
Virginia F1
With the 10.2:1 Compression bump of the '88 MY, I clearly find an improvement in power, mileage and idling with 93 vs 87 or even a mid-grade (89 or 91).
My 240,000 mile original engine probably has an even higher compression bump with the volume-robbing carbon within the CC... and as 93 AKI burns both cooler and more thouroughly than lower AKI rating gas I find the added expense well worth the investment.
PS: My owner's manual calls for at least 90 AKI (U.S. Rating System)
With the 10.2:1 Compression bump of the '88 MY, I clearly find an improvement in power, mileage and idling with 93 vs 87 or even a mid-grade (89 or 91).
My 240,000 mile original engine probably has an even higher compression bump with the volume-robbing carbon within the CC... and as 93 AKI burns both cooler and more thouroughly than lower AKI rating gas I find the added expense well worth the investment.
PS: My owner's manual calls for at least 90 AKI (U.S. Rating System)
02-29-2012, 12:52 PM
#40
This thread is a perfect example of why some of these cars are in the condition they are.
People trying to cheap out on owning a premium brand car.
For those that won't shell out for the right fuel. What do you do for oil? Replacement parts? Maint? Etc?
I would be the guys saving $2 per fill up are not staying on top of timing belts, oil changes, plugs, caps, brakes, etc
People trying to cheap out on owning a premium brand car.
For those that won't shell out for the right fuel. What do you do for oil? Replacement parts? Maint? Etc?
I would be the guys saving $2 per fill up are not staying on top of timing belts, oil changes, plugs, caps, brakes, etc
02-29-2012, 01:39 PM
#44
Rainman
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This thread is a perfect example of why some of these cars are in the condition they are.
People trying to cheap out on owning a premium brand car.
For those that won't shell out for the right fuel. What do you do for oil? Replacement parts? Maint? Etc?
I would be the guys saving $2 per fill up are not staying on top of timing belts, oil changes, plugs, caps, brakes, etc
People trying to cheap out on owning a premium brand car.
For those that won't shell out for the right fuel. What do you do for oil? Replacement parts? Maint? Etc?
I would be the guys saving $2 per fill up are not staying on top of timing belts, oil changes, plugs, caps, brakes, etc
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.
02-29-2012, 01:50 PM
#45
Drifting
The antiknock index is not a measure of the quality of the fuel, but instead is an index of it's antiknock. Run what the engine is built and tuned for. Here's a good article with an explanation: http://www.popularhotrodding.com/tec...gas/index.html