Home » ShopTalk » Manufacturer » Mercedes-Benz » C-Class » 1997 - Higher Octane Premium Gas?

ShopTalk - Automotive Questions and Answers

1997 Mercedes-Benz C280:
Higher Octane Premium Gas?

Alex Steele
Save or Share Information
Print Page
E-mail Page



I've always taken good care of my cars, and right now I'm driving a 1997 Mercedes C280. In the past I have always used nothing but premium gas and I just wanted to be sure that this is the right thing to do with the C280. A lot of people are saying that it's not necessary to use the higher octane.




First thing to do is check the manufacturer recommended octane rating for the particular engine. The 2.8-liter straight-six in your C280 is supposed to run on a 91 or higher octane fuel. The octane rating of gasoline with the Premium name tag can vary depending on where you buy it, but you certainly are in the right ballpark.


The octane rating of fuel is a unit of measurement on a scale intended to indicate the point of detonation or knock. This is the sound produced from a non-uniform burn in the combustion chamber, and this can produce permanent engine damage.


There are several variables that determine which engine needs what octane fuel to run efficiently, without producing a knock. The compression ratio is a major factor (compression ratio determines pressure within the combustion chamber). Mercedes uses a slightly higher ratio than most non-performance passenger cars, and therefore will require a higher octane fuel.


The majority of cars sold in the U.S. can run on their recommended octane rating of 87 without producing a knock, and this is what a lot of drivers want in order to save cash at the pump. However, staying a step ahead of the minimum octane rating to get the best performance and avoid the damaging knock couldn't hurt. For example, using 89 octane in a vehicle you care about which has a recommended rating of 87, is a safe way to go. But using 93 octane would be unnecessary and produce insignificant gains.


See what I mean?


Related Topics:  

Mercedes-Benz | Fuel/Gas | Cost of Fuel
Browse by:  
E-mail Page
Print Page
Save or Share Information

Need Help?

Get FREE Answers from our Technicians at the Mercedes-Benz C280 Forum.


09 Feb 2011, 07:55
Two close-in-class European models; might want to check out Consumer Reports ratings for a reliability evaluation, and read reviews for opinions. But be sure and take a good test-drive in both. The choice often boils down to look and feel.
Justin Bieber 2010
08 Feb 2011, 17:18
I am just making plans for purchasing a new automobile and I require help selecting in between an Audi or a Mercedes?
I'm trying to choose between and Audi A4 and C class
I currently own an A4 and I'm actually happy with it
however I want to hear from those who own a Mercedes or maybe have owned both
which one should I decide on
Thanks for your help


What's your opinion?

Notify me about new comments on this page
*Type characters in below (click image to refresh)

Home » ShopTalk » Manufacturer » Mercedes-Benz » C-Class » 1997 - Higher Octane Premium Gas?
Save or Share Automotive Information
Custom Search