Who uses Super Unleaded on your NA?
#1
Who uses Super Unleaded on your NA?
I get much better performance using super,.. The car feels faster, more responsive, and idles better. Porsche only recommeds 87 octane for the NA right? I dont mind paying the extra cents for Super if it gives me benefits. I even buy a can of Octane booster to add to the tank (too much octane is bad??) Am I just imagining the extra performance I get with super or can anyone attest to this?
#2
It's all in your head, honestly.
Since the gas door sticker only listed RON rating, I didn't know exactly what I was supposed to use so I've always put in 89 rated fuel. But putting higher octane fuel than required doesn't give you any benefits, except maybe a weight reduction in a lighter wallet
Since the gas door sticker only listed RON rating, I didn't know exactly what I was supposed to use so I've always put in 89 rated fuel. But putting higher octane fuel than required doesn't give you any benefits, except maybe a weight reduction in a lighter wallet
#3
What he said! And "cans" or "bottles" of octane booster don't do anything either so DO NOT waste any $$ on them! It would take gallons of the stuff to do what they claim, search for "rocket fuel" (might be in the "old" archive) but an hour of reading will give you a heck of an education about octane.
#4
Yep, I'll second that. Its in your head. Higher octane fuels are more resistant to combustion. So, a higher compression engine needs a higher octane to prevent detonation. If your older NA was designed for 87, give it 87. If anything, 89+ won't burn as cleanly in that car, and lead to some build-up.
Ditch the octane booster, fill up on 87, and run some injector cleaner through that puppy.
Ditch the octane booster, fill up on 87, and run some injector cleaner through that puppy.
#6
Originally posted by iloveporsches
It's all in your head, honestly.
It's all in your head, honestly.
#7
Originally posted by Jessa
Yep, I'll second that. Its in your head. Higher octane fuels are more resistant to combustion. So, a higher compression engine needs a higher octane to prevent detonation. If your older NA was designed for 87, give it 87. If anything, 89+ won't burn as cleanly in that car, and lead to some build-up.
Ditch the octane booster, fill up on 87, and run some injector cleaner through that puppy.
Yep, I'll second that. Its in your head. Higher octane fuels are more resistant to combustion. So, a higher compression engine needs a higher octane to prevent detonation. If your older NA was designed for 87, give it 87. If anything, 89+ won't burn as cleanly in that car, and lead to some build-up.
Ditch the octane booster, fill up on 87, and run some injector cleaner through that puppy.
I always thought a higher octane fuel burns cleanlier..I guess this is wrong?
I swear, it can't be in my head that I feel this. Anyone else?
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#8
i run highest octane(93) and the only reason i do is to run clean stuff through the motor. I dont do it for it to run any faster because it wount, just to keep it clean. Money isnt really a factor because 1 tank last me about 2 weeks(drive it 1-2 times a week.)
#9
Originally posted by iloveporsches
Further question: Is gas from places like Mobil or Chevron actually better than places that are .05-.10 cheaper per gallon?
Further question: Is gas from places like Mobil or Chevron actually better than places that are .05-.10 cheaper per gallon?
#10
Originally posted by esanmiguel
I swear, it can't be in my head that I feel this. Anyone else?
I swear, it can't be in my head that I feel this. Anyone else?
Well, it, too, was supposed to run on 87. I switched, the gas milage went up a smidge and I doubt it got any slower. Sometimes our assometers don't measure accerleration very reliably
#11
Originally posted by iloveporsches
Further question: Is gas from places like Mobil or Chevron actually better than places that are .05-.10 cheaper per gallon?
Further question: Is gas from places like Mobil or Chevron actually better than places that are .05-.10 cheaper per gallon?
#12
They all buy their gas from a few suppliers, and the additives are all marketing IMO. The only reason I'd stay away from a no-name gas station is that their equipment might not be as well maintained, possibly allowing water into the gas.
If you really believe your car runs better on premium, than maybe it is worthwhile!
If you really believe your car runs better on premium, than maybe it is worthwhile!
#13
Well, after searching the net re: octane, seems like the added octane does not benefit anything unless your car knocks on 87 octane. Same with octane boosters being no advantage. The only benefit a high octane gas would give you is if your car has knock sensors which I dont think my 944 has. I guess the peformance gain is in my head.
So why does our Volvo 2.4 Turbo require premium gas then? Cause its Turbo?
So why does our Volvo 2.4 Turbo require premium gas then? Cause its Turbo?
#14
Originally posted by iloveporsches
Further question: Is gas from places like Mobil or Chevron actually better than places that are .05-.10 cheaper per gallon?
Further question: Is gas from places like Mobil or Chevron actually better than places that are .05-.10 cheaper per gallon?
He works in a big Exxon refinery and swears it's true...
#15
I'll agree with esanmiguel that there's a subjective feel of improved performance with the higher octane. I usually run the lowest octane that eliminates pinging under load but in the 944 with a modified DME, exhaust and intake, I prefer to use premium to reduce the risk of detonation! It's only money, right?
Note that FR Wilk's site recommends running super for a while after chip installation... so presumably after a certain period the DME/AFM adjusts to optimize combustion with the lower octane.
Note that FR Wilk's site recommends running super for a while after chip installation... so presumably after a certain period the DME/AFM adjusts to optimize combustion with the lower octane.