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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #351  
Old 04-14-2014, 11:36 PM
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I'm not really convinced premium gas is cleaner.
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  #352  
Old 04-15-2014, 08:35 AM
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Nor is it necessary. Read your owners manual.
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  #353  
Old 04-15-2014, 10:42 AM
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Quote:
Unleaded gasoline only.

Minimum octane requirement: 89 AKI

Higher octane fuels will provide increased
performance and fuel economy,
while the use of gasoline with a
lower octane rating will have an adverse
effect.
Why wouldn't you use premium?
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  #354  
Old 04-15-2014, 11:00 AM
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Because, as I said, and the owners manual confirmed, it's not required. Their statement about premium fuel is false according to MANY lab tests. Burning higher octane fuel than what is requires is a waste of money. It doesn't perform any better, it doesn't keep the engine any cleaner. 89 octane is not premium. It's mid-grade.

Read for yourself:

https://www.consumer.ftc.gov/article...ctane-gasoline

http://auto.howstuffworks.com/premiu...y-vehicles.htm

http://www.edmunds.com/fuel-economy/...g-premium.html

http://www.consumerenergycenter.org/...s_premium.html

If you want to keep wasting money on 91/93 octane, go ahead.
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  #355  
Old 04-15-2014, 12:43 PM
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I'm usually more concerned about the quality of the gasoline than the octane. There are a few "independent" convenience stores near my house that always have cheaper gas than everyone else, and I rarely see the same distributor's truck there twice. The base cost of the gasoline is essentially the same for everyone (Valero refines and sells the large majority of the base gas in the U.S.) and it's the additive packages that drive the cost differences. To sell for 15 to 20 cents per gallon less than everyone else, they've got to be taking some gas with just minimal additives.
If there's only a small cost difference between the mid grade and higher octane, I'll spring for the higher, but that's mainly because I'm running the car really hard for autoX in really hot weather and I don't want any risk of pre-ignition.
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  #356  
Old 04-15-2014, 04:40 PM
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Using higher octane makes sense if you've advanced your timing with a chip or software, but otherwise, its useless. I haven't met one person who's understood what octane does in gas, most people think its more explosive or powerful, or that its cleaner. And neither one could be more wrong. Sometimes I think people get this impression because faster or more expensive cars often say they require it.
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  #357  
Old 04-15-2014, 05:28 PM
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Quote:
Originally Posted by dwonda View Post
Using higher octane makes sense if you've advanced your timing with a chip or software, but otherwise, its useless. I haven't met one person who's understood what octane does in gas, most people think its more explosive or powerful, or that its cleaner. And neither one could be more wrong. Sometimes I think people get this impression because faster or more expensive cars often say they require it.
Higher octane just means a higher auto ignition temperature, which translates to greater resistance to pre-ignition. The indirect translation to more power is that it allows running higher compression ratios with less risk of engine damaging detonation, but you have to make the physical change to the engine to capture it, not just change the fuel in the tank.
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  #358  
Old 04-15-2014, 05:31 PM
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And THAT ladies and gentlemen is what you call a correct answer!!! I need more people like you in my life I think.
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  #359  
Old 05-14-2014, 09:56 PM
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I think im kinda confused reading, im in california and is it best to use mobil1 0w40 or the mobil 1 high mileage 5w30?? Its summer and its hot here now like 100f today and i think its ok to use it all year. Round yah??
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  #360  
Old 05-14-2014, 10:05 PM
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Originally Posted by ESICKTY View Post
I think im kinda confused reading, im in california and is it best to use mobil1 0w40 or the mobil 1 high mileage 5w30?? Its summer and its hot here now like 100f today and i think its ok to use it all year. Round yah??

Use Castrol Edge 0W-40 European Formula. Can be found at Walmart for $25 in a 5 quart jug.


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  #361  
Old 05-15-2014, 05:41 PM
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Use whatever you want to because everyone will tell you something different.
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  #362  
Old 05-15-2014, 07:46 PM
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Quote:
Originally Posted by dwonda View Post
Use whatever you want to because everyone will tell you something different.
So i guess both mobil1 0w40 and mobil1 5w/30 is ok? Yah? TIA
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  #363  
Old 05-15-2014, 07:50 PM
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Go by the temp rating in the owners manual. I wouldn't run a 5W30 though - it's too thin for your climate. I use Mobil 1 0W40 here, but I'm not in SoCal.
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  #364  
Old 05-15-2014, 07:55 PM
ESICKTY ESICKTY is offline
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Quote:
Originally Posted by ZeGerman View Post
Go by the temp rating in the owners manual. I wouldn't run a 5W30 though - it's too thin for your climate. I use Mobil 1 0W40 here, but I'm not in SoCal.
Ok i will stick with mobil1 0w40 thanks!!!!!
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