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post #1 of 8 (permalink) Old 01-31-2008, 10:43 AM Thread Starter
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gasoline

hi!
bought my first mb. 1999 c280. i love it! is it vital that i use premium fuel
91 oct or better or can i get away using regular?
thanks!
todd
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post #2 of 8 (permalink) Old 01-31-2008, 11:05 AM
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ive been using regular and i have had no problems....so has my dad and hes had his benz for 2 years now and its running fine
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post #3 of 8 (permalink) Old 01-31-2008, 11:30 AM
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You may get away with it, but is it really worth the chance?

Lets assume that you get 20 mpg, that you drive 10,000 miles a year and that premium costs 20 cents a gallon more than regular.

It will cost you $100/year more to use the recommended fuel.

In your case you probably get closer to 30 mpg and your cost will be well under $100/year to use the right stuff.

It isn't worth the risk, not to me anyway. Not when the cost of repairing one of these things can break the bank.

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post #4 of 8 (permalink) Old 01-31-2008, 11:33 AM
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This has been discussed many times. If your owners manual says to use premium, use premium.

Mike
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post #5 of 8 (permalink) Old 01-31-2008, 11:41 AM
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Hi Todd,

You need to fill out your profile so we know where you live.

I live in Minnesota where regular is E10 (10% ethanol) while premium is all gas. I am no engineer but I would never put regular in either of my MBs. When MB says "premium only" I take that to read "no ethanol".

Remember E85 gas results in about a 25% reduction in milage. So it only makes sense that E10 also results in lower gas milage. So when one works out $/mile it can be cheaper filling up with premium. I talked to someone with a Suburban who fills up with premium for trips because he finds the better gas milage more than offsets the price difference. Around town he uses regular.

Do what you like. Personally I drive a premium luxury car and treat it as such.

W210 - Black and Black '00 E430 Sport
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post #6 of 8 (permalink) Old 01-31-2008, 11:50 AM
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Quote:
Originally Posted by tekern View Post
hi!
bought my first mb. 1999 c280. i love it! is it vital that i use premium fuel
91 oct or better or can i get away using regular?
thanks!
todd
TEKERN;
This has been discussed here ad nauseum.
I understand that if you are USED TO using cheap 87 Octane Gasoline
it's a little hard on the wallet paying for Super Unleaded/High Test.

However the Stuttgart Engineers have engineered this car to be a High Compression Engine, like the Porsche, Ferrari, Corvette, Rolls Royce etc.
All high compression engines. Your Mercedes Benz IS a High-Compression Engine.

Use 91 Octane or better.

( Wait until the question is asked about which gasoline is better?
Do I "have to" use Synthetic Oil? etc etc. ) haha.

WELCOME TO THE FORUM.

Charles
New York City, NY
Richmond County

United States of America
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post #7 of 8 (permalink) Old 02-02-2008, 10:07 AM
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It's not worth the chance, use premium and google "top tier gasolines" for a list of the best out there. Baby your Benz and you will derive the benefits.

Mercedes Benz - Das beste oder nichts!

Last edited by Musikmann; 02-02-2008 at 05:16 PM. Reason: spelling
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post #8 of 8 (permalink) Old 02-02-2008, 12:00 PM
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I have done this twice and my wife gave me 20 lashes. I noticed the performance loss and will never subject my C230 to this again. The cost of injectors and anything else in the combustion chamber will cost you and arm and that leg. Plus 87 has a chance of being more dirty ie less detergent for the engine.
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