which octane gas for 07 R500? - Page 2 - Mercedes-Benz Forum

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post #11 of 12 (permalink) Old 10-26-2009, 01:05 PM
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Testing? Sure is.
I tested this idea last year. Always used 93/91 Octane as per MB specs.
Decided to switch to 87 Octane, Chevron and within 30 minutes my car
was "bucking" and "snorting".
The gasoline, 87 Octane, did a number on my MB.

I went to Autozone, spent $6 on Octane Booster and the problem went away.

So that's my experience with NON Spec 87 Octane Gasoline.

For me, it's Chevron with Techron or Sunoco.

Originally Posted by TennJon View Post
Hi -
Are there really any issues with running 89 in the V8? Has anyone done any testing to see how it effects mpg? and or engine smoothness? I have a friend who's only run 87 and 89 in his R350 and he said in 40k miles he's noticed no problems and upwards of 24 mpg.

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post #12 of 12 (permalink) Old 10-26-2009, 03:22 PM
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Inadequate gas can only be recommended by uncaring mechanics, people who don't know what they are saying, or whoever does not wish to be your friend. Pay the piper and get the super.
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