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#41
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The best fuel to use is the lowest octane rating that does not detonate. Just because 87 does not detonate in winter does not mean it won't in the middle of summer when temperatures rise. Of course there are safety margins in BMW's recommendation of 91 under most normal operating conditions but why chance it for a few dollars a tank. I have destroyed several race motors due to detonation and it is not cheap! |
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#42
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i just wounder, is it ok that i put shell v-pover (100 pctane) on my 4.8 since i bought it? i think its ok, because i asked in bmw service here in Geneva, they told that is allright. Also he told me that its not good to go down with gasolin which has lower octane.
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#43
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Ive 100 octane in my M5 and M3 and it ran great. i was gonna put some in my X5 just for the hell of it this summer
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Dinan M3 2006 X5 4.4i Sport Current Vehicle 2006 CLS 55 AMG Current Vehicle 2010 FORD F-450 King Ranch Current Vehicle 2012 GL 550 Current Vehicle 1999 M3 Dinan S3 SOLD 2001 M3 Dinan S2 SOLD 2002 M5 SOLD 2004 X5 4.4i sport SOLD 2007 335 XI Lease ended 2009 E92 M3 SOLD |
#44
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Engine damge vs a paltry savings aside, isn't it a zero sum argument anyway? Before the X5, the Volvo R would run fine on 87 but a tank of 91 or 93 yielded more miles, so I've only run the 91 or 93 in the X. I only fill up about every 10 days, so if burning premo is an issue, I need to be looking at a bus pass.
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2004 X5 4.4i Sterling Grey/Black Sport Prem 132s/Diamaris Rear Climate OEM Nav/Sirius RBs AngelBrights Roundel Valve Caps, 35% front tint. Sold MArch 2012
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#45
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Quote:
The biggest mistake made is that people assume that a higher AKI is somehow better. If you have a sufficient AKI to resist predetonation, anything else is lost. Your engine can't tell the difference.
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue |
#46
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Quote:
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue |
#47
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Quote:
__________________
2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue |
#48
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Because if this is something that is even lower... A friend of mine has Mazda rx-8 and he puts Sans plomb 93 into his tank, and i think it wouldn't run on that if it would be something les than 93. |
#49
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Quote:
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2004 X5 4.4i Sterling Grey/Black Sport Prem 132s/Diamaris Rear Climate OEM Nav/Sirius RBs AngelBrights Roundel Valve Caps, 35% front tint. Sold MArch 2012
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#50
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Quote:
I would guess that the 93 unleaded your friend uses is very close to 87 pump octane in North America. Just as with the BMW engine, a Mazda will run fine on 87 pump octane, it just may not develop all of the power it is capable of.
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2007 X3 3.0si, 6 MT, Premium, White Retired: 2008 535i, 6 MT, M Sport, Premium, Space Grey 2003 X5 3.0 Steptronic, Premium, Titanium Silver 2002 325xi 5 MT, Steel Grey 2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue |
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