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  #1  
Old 01-15-2003, 03:07 PM
haasman's Avatar
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Location: San Francisco, CA
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Quick Q: '87 190 2.3 ... Regular or premium?

I am trying to determine which fuel grade for my daughter's '87 190 2.3: Regular or Premium?

Thank you in advance,

Haasman
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  #2  
Old 01-15-2003, 03:26 PM
G-Benz's Avatar
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Join Date: Apr 2001
Location: Dallas/Fort-Worth
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I run premium because it's recommended by MB.

No fuel-related problems yet, but that may not have anything to do with octane quality.

If ever I do have a fuel-related issue, at least it's a parameter I can rule out.

Many on this forum used regular (81-85) and have had good results.

Higher octane fuels have a higher "flash point" i.e., needs higher temps in order to ignite. So there is less of an issue with problems such as "pre-ignition" or detonation.

But if you start hearing pinging under load conditions, then you do need to bump up the octane choice.
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  #3  
Old 01-15-2003, 03:30 PM
Achieving Salvation
 
Join Date: Sep 2002
Location: Madison, Wis.
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I have a 190e 2.6 and use mid-grade. Regular octane gas can really affect starting conditions when it's very cold outside. I've found it less problematic with the mid-grade.

I used preimium when I first bought the car, and it didn't run so great. MUCH better with mid-grade.
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  #4  
Old 01-15-2003, 05:26 PM
haasman's Avatar
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Thanks for the input!

Haasman
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'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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