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Old 02-04-2004, 01:47 PM   #1
BMW_M52_M20
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What Octane fuel do you use in your e30?

Well, my 325e says I can use regular unleaded, but I always use premium because it does run a lot better.....
I don't notice any difference in the e36 between 89 and 91 octane, they seem to run the same way.
Anyone else find this?
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Old 02-04-2004, 02:06 PM   #2
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87 or whatever it says on your manual. And 'it does run a lot better' with higher octane fuel is a myth, unless you have a chip installed. You are just wasting your money.

http://www.ftc.gov/bcp/conline/pubs/autos/octane.htm
http://auto.howstuffworks.com/question90.htm
http://www.pontiacstreetperformance....Mythsgas1.html
http://www.toyotacelicas.com/informa.../gasmyths.html
http://www.techweasel.com/articles/octane.htm

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Old 02-04-2004, 02:53 PM   #3
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i have a chip so i put 94 whenever i can, 91 if i run out and cant find a sunoco around

though, even before getting the chip i experimented a bit and found i got more mileage with higher octane fuel..then again maybe it was just my imagination
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Old 02-04-2004, 03:32 PM   #4
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Quote:
Originally posted by johnoz
87 or whatever it says on your manual. And 'it does run a lot better' with higher octane fuel is a myth, unless you have a chip installed. You are just wasting your money.
With every other car I have driven, I agree 100% including my e36, no myth with my car, acceleration is noticably better and is much more responsive. It is a really a night and day difference with my 325e
Jay
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Old 02-04-2004, 03:38 PM   #5
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I used to put in silver, now I put in regular. I can't affoard to pay 77 cents a litre and drive to rexdale everyday.
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Old 02-04-2004, 04:27 PM   #6
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In case if I get a chip I should put 91-94? Pure stock is 87 octane ?
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Old 02-04-2004, 05:28 PM   #7
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yeah depends what the chip is best configured for...when i was talkign to markD when he was making my chip he could have programmed it for 94 octane which woulda been a bit better performance wise... but i said to just make it for 91 octane because it would be a hassle to always have to find a sunoco if im in desperate need of gas, or in unfamiliar areas
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Old 02-04-2004, 05:32 PM   #8
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93 for me, commonly called gold. I can feel the difference when it comes down to accerlation also in exhaust smell. the lower octane fuel usually smells louder.

i think an older vehical ('96 early) would benefit the most from high octane fuel because of age and engine wear.
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Old 02-04-2004, 06:18 PM   #9
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I use 92 because I got a chip. I once went at a service gas station and the guy put reg in.... my performances weren't as good and I got the check engine light.

When it was stock, I used to put all kind of gas(87, 89-90, 92) and did not noticed any gain or loss of power.
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Old 02-12-2004, 06:47 AM   #10
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yeah i notice when i put 87 into the m3 it runs great
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Old 02-12-2004, 06:48 AM   #11
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hell sometimes i throw lead in just to be safe
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Old 02-12-2004, 07:04 AM   #12
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Quote:
Originally posted by BMW BMXer
I used to put in silver, now I put in regular. I can't affoard to pay 77 cents a litre and drive to rexdale everyday.

i take it those 77 cents are canadian. that equals around 45 european cents. we usually pay €1,05/litre here in finland! but then again we use 95 and 98 octane
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Old 02-12-2004, 07:11 AM   #13
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Is there such a thing as Too Much Octane???

I also have a chip in my car and try to "gold" gas

I just wanted to know if anybody uses "Octane Booster"
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Old 02-12-2004, 05:51 PM   #14
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I have been told by a BMW mechanic not to use sunnoco 94 octane because it contains a fair bit of ethanol to get the higher octane, and it does say on their pumps that it could contain up to 15% ethanol.....I don't think e30's can use ethanol....so is this true? is it bad to use? I suppose it could mess up the O2 sensor, or the injectors.....
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Old 02-12-2004, 06:53 PM   #15
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i put 89 90% of the time, and 91/93 when gas is real cheap///
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