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#2
04-26-2005, 02:30 PM
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I think the minimum you can use is 91... I think people HAVE used lower octane ratings, but I don't think it's good.
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Curious Joel 2002 BMW X5 4.4i retired 2003 BMW 330xi retired 2007 BMW 335i Coupe Montego Blue-Saddle Leather-Light Poplar Wood-Sport Package-Premium Package-Navigation w/iDrive-Comfort Access-Park Distance Control-Automatic w/Paddle Shifters-USB iPod link-Autobahnd clear bra
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#3
04-26-2005, 02:44 PM
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None of the BMWs I've owned have ever run properly on anything but premium.
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1984 318i/man./Tornadorot* 1990 525i/man./Alpinweiß* 2001 525i/man./SP/PP/Cosmosschwarz/Sandbeige* 2002 X5 3.0i/man./SP/PP/Sirius/BT/Titansilber/Sandbeige* 2006 330i/man./SP/PP/CWP/Sirius/Blackline/Rear Fogs/Arktis/Grau* 2001 525i/step./SP/PP/CP/CWP/Xenons/Rear Shade/OEM Sirius/OEM BT/OEM AUX/M5 Rear Sway/Bilstein HDs/Beisan Vanos/Rear Fogs/Schiefergrün/Sandbeige* 2012 VW Golf R/Rising Blue* 2013 X1 xDrive35i Alpinweiß/Schwarz/M Sport/Premium/Tech *retired
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#4
04-26-2005, 02:47 PM
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All BMW's are optimized for high octane (premium) gas, that includes the sotware (the chip) that runs your car. Putting lower octane in your car won't break it, but your car wil not run as well, and you could void the warranty. Also keep in mind that you won't save money on gas as well since your overall milage will go down as well... Cheaper gas= Lower milage (if your car is optimized for higher one, of course).
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#5
04-26-2005, 04:44 PM
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There is some discussion In This Thread as to whether lower octane gas is good or bad for the X5.
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- 2005 X5 4.8is: LeMans Blue, Black/Blue Alcantara Leather Interior, Navi, Retractable cargo floor, Rear Side Impact Air Bags - 2011 335i Sedan: Vermillion Red, Navi, Beige Leather Interior, Harmon Kardon Audio, Fully Loaded - 2006 330xi Sedan: Titanium Silver, Navi, Dakota Leather, Fully Loaded - 1987 Yamaha: Virago 700cc
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#6
04-27-2005, 09:56 PM
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Actually the octane level does not effect gas mileage. Additionally, your engine management software will adjust detonation for the lower octane level.
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Current Cars: 2008 X5 4.8i - Blk/Saddle 2001 330Ci - Titanium/Black Sport/Premium Past Cars: 1993 325is Blk/Blk Sport 1995 M3 Blk/Blk 1997 328iC Blk/Blk Sport/Premium 1998 M3 Silver/Black 2001 M5 /Black/Black/Sport 2005 X5 3.0i - Blk/Blk Sport/Premium
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#8
04-27-2005, 10:55 PM
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Because that is what the software is optimized for from the factory... It will adjust though. Pre engine management software cars would not be able to adjust and you would get knocking in the engine because the detonation wasn't executing correctly.. Modern cars adjust... It would be better of course to use the 91 octane - but of course with what gas prices are...
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Current Cars: 2008 X5 4.8i - Blk/Saddle 2001 330Ci - Titanium/Black Sport/Premium Past Cars: 1993 325is Blk/Blk Sport 1995 M3 Blk/Blk 1997 328iC Blk/Blk Sport/Premium 1998 M3 Silver/Black 2001 M5 /Black/Black/Sport 2005 X5 3.0i - Blk/Blk Sport/Premium
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#10
04-27-2005, 11:13 PM
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Here is a quote from an article about gas
What's the benefit of higher octane? Higher octane fuel has only one beneficial feature - it allows an engine to run at higher temperatures with more advanced ignition timing under higher levels of compression witout detonating / knocking. Higher octane fuel does NOT have more potential energy and will not make an engine perform better unless that engine is knocking. On modern engines with knock sensors, higher octane fuel may make the engine run better if the knock sensors are retarding the ignition timing, which hinders performance. High octane fuel does not burn cleaner, it does not clean your engine, it does not increase horsepower or torque (unless you are experiencing knock), it does not smell better, it does not increase fuel economy (unless you are experiencing knock) and is not better for the environment. If you buy higher octane fuels for any of the above reasons, STOP! here is a link to the article http://www.superchargersonline.com/content.asp?ID=105
__________________
Current Cars: 2008 X5 4.8i - Blk/Saddle 2001 330Ci - Titanium/Black Sport/Premium Past Cars: 1993 325is Blk/Blk Sport 1995 M3 Blk/Blk 1997 328iC Blk/Blk Sport/Premium 1998 M3 Silver/Black 2001 M5 /Black/Black/Sport 2005 X5 3.0i - Blk/Blk Sport/Premium Last edited by bimmerfan; 04-27-2005 at 11:16 PM.
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