R-Class (W251) Produced 2006-2013: R320CDI, R350, R420CDI, R500

Octane fuel question

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Old Oct 30, 2010 | 03:22 PM
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Octane fuel question

Hello,

We just got our 2006 R350 and like it a lot. We were wondering if it's safe to use 87 or at least a mid-grade octane for our vehicle?

Thanks in advace! You guys are great!

e
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Old Oct 30, 2010 | 06:57 PM
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Please read your manual regarding fuel usage. When you are done read the threads on this subject that have been posted all over MBWorld.
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Old Oct 30, 2010 | 08:25 PM
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Originally Posted by amdeutsch
Please read your manual regarding fuel usage. When you are done read the threads on this subject that have been posted all over MBWorld.
Thanks for your input amdeutsch although I haven't read my manual yet I'm sure it will say to use premium fuel only. Also before posting this thread I tried to do a search a few times on this topic but was unsuccessful doing so. So if you or someone else would be kind enough to help me with my topic question or give me a link on information about it I would greatly appreciate it.
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Old Oct 30, 2010 | 11:55 PM
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
Knock knock

Hello mcFly
Read your manual as stated before
The answer is No
Link here if you need more info on the subject
it goes into the subject quite throughly
https://mbworld.org/forums/r-class-w...ml#post4328992
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Old Oct 31, 2010 | 07:51 AM
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08 R350, 12 Mercedes R350
In my opinion, the answer is NO.

a) Using 87 or 89 Octane gas, your MPG is suffered (lower) compare with 92 Octane. So you will not save much money.
b) It might damage the knock sensor if using for a long time.
c) Slow in acceleration.
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Old Oct 31, 2010 | 08:13 AM
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Originally Posted by ohlord
Hello mcFly
Read your manual as stated before
The answer is No
Link here if you need more info on the subject
it goes into the subject quite throughly
https://mbworld.org/forums/r-class-w...ml#post4328992
Great Scott! Thanks Biff! You're the best!
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Old Oct 31, 2010 | 08:16 AM
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Originally Posted by AsianR350
In my opinion, the answer is NO.

a) Using 87 or 89 Octane gas, your MPG is suffered (lower) compare with 92 Octane. So you will not save much money.
b) It might damage the knock sensor if using for a long time.
c) Slow in acceleration.

Thanks for your input AsianR350. I'll take that into consideration.
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