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#2
08-05-2001, 04:02 PM
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Yup,
Everywhere I go only has 91 octane now. Just a way to cut costs/lower gas prices I suppose.
__________________
2006 E350 w/ 155k miles (Daily Driver) Previous: 1993 300E 3.2L Sedan w/ close to about 300k miles 2003 E500 Brilliant Silver (Had 217k miles when totalled!) 1989 300E with 289,000 miles (had for <1 yr while in HI) 03 CLK 500 cabrio (Mom's) 2006 C230k (Dad's) 1999 S420 (Mom's/Dad's) 2000 C230k Sport sedans 2001 CLK320 Cabrio (Mom's) 1995 C280 My First Mercedes-Benz... (155k miles. EXCEPTIONAL AUTOMOBILE. Was Very hard to let go of!) 
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#3
08-05-2001, 08:29 PM
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Actually from what I've heard, the reason for the change from 92 to 91 is due to the phasing out of an additive called MTBE. They now use ethanol as a substitute for MTBE, which was outlawed because it was found to pollute groundwater. I don't really believe this since other states have 92 & even 93 octane gasoline and don't use MTBE.
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#4
08-05-2001, 09:09 PM
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Here in N.J. Sunoco has 94 octane.
__________________
1999 MB SL500 (110,000 mi) 2004 Volvo V70 2.5T (220,000 mi) 2014 Tesla Model S 85 (136,000 mi) MBCA member
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#5
08-06-2001, 08:52 AM
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Tops out at 93 octane in Texas, but when I travel to the midwest, I have to settle for 91...
__________________
2009 ML350 (106K) - Family vehicle 2001 CLK430 Cabriolet (80K) - Wife's car 2005 BMW 645CI (138K) - My daily driver 2016 Mustang (32K) - Daughter's car
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#6
08-06-2001, 04:00 PM
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I heard there are several reasons for dropping to 91 octane. A couple are technical reasons from the sister of the hairstylist of the accountant of a guy who works at the Tosco refinery. The one I remember best is that they can lower the price of premium by lowering the octane.
Guys I know who run dataloggers note that they aren't seeing more knock sensor activity with the lower octane gas. Maybe it's a matter of time until the the remaining 92 octane gas is completely out of the supply system. BTW, it started in the Bay Area in July with full implementation by August 1st. Regards, Sixto 91 300SE
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What happened to 92 octane in SFO?
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