89 Octane...i tried it...
03-31-2006, 11:18 PM
#1
5th Gear Member
Thread Starter
Join Date: Apr 2005
Location: Richmond, Virginia
Posts: 4,083
89 Octane...i tried it...
i tried 89 octane today...noticed that when i turn my car off and turn it back on again after the car has been sittin for a while that the car trembles...sorta like going over really smooth bumps but then after it warms up it ran fine. I noticed also that it was quieter...i left the car running and i had to get into the trunk and i could barely even hear the exhaust running. Is there a reason why it was making that bumpy feeling?
04-01-2006, 01:31 AM
#2
2nd Gear Member
Join Date: Mar 2006
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Posts: 333
RE: 89 Octane...i tried it...
no idea but to add to your gas questions when i use the cheap grade whatever it is i hear a pinging in the engine so most of the time i run on middle or upper grade and i dont have much difference in sound or the bumpy thing
04-01-2006, 02:17 AM
#3
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Join Date: May 2005
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Posts: 7,445
RE: 89 Octane...i tried it...
ORIGINAL: Slicktastyk Matt
i tried 89 octane today...noticed that when i turn my car off and turn it back on again after the car has been sittin for a while that the car trembles...sorta like going over really smooth bumps but then after it warms up it ran fine. I noticed also that it was quieter...i left the car running and i had to get into the trunk and i could barely even hear the exhaust running. Is there a reason why it was making that bumpy feeling?
i tried 89 octane today...noticed that when i turn my car off and turn it back on again after the car has been sittin for a while that the car trembles...sorta like going over really smooth bumps but then after it warms up it ran fine. I noticed also that it was quieter...i left the car running and i had to get into the trunk and i could barely even hear the exhaust running. Is there a reason why it was making that bumpy feeling?
04-01-2006, 11:34 AM
#7
5th Gear Member
Join Date: Jan 2006
Location: Severn, Md
Posts: 2,298
RE: 89 Octane...i tried it...
Octane will NOT effect how your car idles. Unless your car NEEDS octane, it will not change how it runs. High compression, advanced timing, forced induction, thats what really needs the octane. Not a stockish V6 mustang.
04-01-2006, 10:25 PM
#8
RE: 89 Octane...i tried it...
Well I'm stumped, the only thing I can think of is your not making quite enough spark to fully detonate the gas imidiately after it turns over. But the exhaust thing should be because your engine is running smoother. I hate to tell you this, but it also could of been bad gas, yea it happens.
04-01-2006, 11:43 PM
#9
5th Gear Member
Thread Starter
Join Date: Apr 2005
Location: Richmond, Virginia
Posts: 4,083
RE: 89 Octane...i tried it...
Hmm...well i just filled up again (i only put in about 2ish gallons yesterday) and man i can tell the difference...the engine sounds so different...not nearly as smooth and quiet. I think i may stick to 89 as long as it doesnt screw things up. And for the jittery feeling it was giving me, it stopped doing that but when it did it only would tremble for a couple seconds then it would drive nicely.
