Petrol For C63s
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Super Member
Joined: Oct 2015
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From: Abu Dhabi, United Arab Emirates
C63S 2016
Petrol For C63s
Hello there!
Guys I just wanted to make sure, on AMG's website, the fuel for the C63s is recommended to be premium unleaded. Well, the name they give it might differ from country to country.
I wanted to make sure on one thing because I've read several people writing that premium unleaded translates into 95 octane petrol? I always thought it that the C63s would need super (98 oct.) petrol?
Any takes on that?
Guys I just wanted to make sure, on AMG's website, the fuel for the C63s is recommended to be premium unleaded. Well, the name they give it might differ from country to country.
I wanted to make sure on one thing because I've read several people writing that premium unleaded translates into 95 octane petrol? I always thought it that the C63s would need super (98 oct.) petrol?
Any takes on that?
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2018 AMG GTR, 2017 GLS63, 2019 C63s
In California "super" or premium is 91 octane rating. That is the minimum octane allowed for California c63s and the maximum that is readily available at gas stations. Other countries don't have to comply with California emission laws. You will see what type you need based on the info inside the gas door that should be specific to your country.
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From: Chapel Hill, NC
2015 C63S E1; 2016 C450 AMG
Remember, octane ratings are different between the United States and Europe. I believe that 93 in the US is equivalent to 98 in Europe.
Based on this, the C63S will run best on 98 in Europe.
Based on this, the C63S will run best on 98 in Europe.
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From: SoCal
2016 C63S Sedan
Ira is correct as Europe and a lot of the world uses RON (research octane number) and the US and Canada uses AKI (Anti knock Index)and it is as he says about 5 points lower if comparing in the US. So CA get 91AKI or same as 96RON and the rest of the US is 93AKI or 98Ron as in Europe.
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2020 C63s Coupe, 2016 C63s Sedan
Also, don't use a higher octane than is needed. Using a higher octane than is needed will lower performance.
In simplified terms, the higher the octane, the slower the fuel burns.
As an example. an engine tuned for maximum performance on 100 octane fuel will actually make less power using 120 octane fuel than it would it using 100 octane.
In simplified terms, the higher the octane, the slower the fuel burns.
As an example. an engine tuned for maximum performance on 100 octane fuel will actually make less power using 120 octane fuel than it would it using 100 octane.
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MBWorld Fanatic!
Joined: Nov 2008
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From: SoCal
2018 AMG GTR, 2017 GLS63, 2019 C63s
Also, don't use a higher octane than is needed. Using a higher octane than is needed will lower performance.
In simplified terms, the higher the octane, the slower the fuel burns.
As an example. an engine tuned for maximum performance on 100 octane fuel will actually make less power using 120 octane fuel than it would it using 100 octane.
In simplified terms, the higher the octane, the slower the fuel burns.
As an example. an engine tuned for maximum performance on 100 octane fuel will actually make less power using 120 octane fuel than it would it using 100 octane.
Mainly applies to older engines where only one or two timing options were possible. Managed engines self adjust and are able to some extent make the higher octane work for them. Imo.
Most premium gas engines in Cali market are tuned to aki 93 but are able to detune automatically to accommodate 91 as a small compromise.
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2020 C63s Coupe, 2016 C63s Sedan
Yep, there is a certain amount of flexibility built in.
I can't count how many times I've been at the track and overheard "It runs good on 93 octane - so I'm going to put some VP 109 in it" and then they scratch their heads when the car runs a slower ET and MPH.
I can't count how many times I've been at the track and overheard "It runs good on 93 octane - so I'm going to put some VP 109 in it" and then they scratch their heads when the car runs a slower ET and MPH.
MBWorld Fanatic!
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From: SoCal
2018 AMG GTR, 2017 GLS63, 2019 C63s
I have learned to keep it to myself for this specific topic. That is why it was refreshing to hear from someone else.
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From: SoCal
2016 C63S Sedan
Ahhh, wise words. Agreed.
Mainly applies to older engines where only one or two timing options were possible. Managed engines self adjust and are able to some extent make the higher octane work for them. Imo.
Most premium gas engines in Cali market are tuned to aki 93 but are able to detune automatically to accommodate 91 as a small compromise.
Mainly applies to older engines where only one or two timing options were possible. Managed engines self adjust and are able to some extent make the higher octane work for them. Imo.
Most premium gas engines in Cali market are tuned to aki 93 but are able to detune automatically to accommodate 91 as a small compromise.
