What fuel do you use in your car?

[E55BOF]

AMGs are designed / optimised for 99RON.

If that is so, I wonder why it specifies 98 RON inside the fuel flap on my R172 SLK 55? The M152 (n/a derivative of the M157) is a high-compression engine too - 12.6 to 1. I'm inclined to believe MB know best...

 

[Spider10]

Same on the w204 c63

 

[mioba]

Oh the goldfish, he's a nice fish. And he swims, round and round. Round and round and, round and round. Round and round and, round and round.

Still round and round

 

[c3nturi0n]

Has anyone tried booster additive with 99oct?

 

[E55BOF]

Why would you want to?

 

[merc85]

two stroke now and again and vso32 mix with derv

 

[badgx]

Has anyone tried booster additive with 99oct?

The injectors on the m156 should be replaced once every 60k, so as a precautionary measure i use injector cleaning additive once in its life cycle of 60k to help keep the injector nozzles as gunk free as possible. One time use only.

Since the arrival of E5, i do top up occasionally with octane booster to help improve the quality of fuel.

 

[ube63]

Has anyone tried booster additive with 99oct?

I am interested in this too. Considering to travel to Hebrides in my E63 and 99 octane isn't readily available over the islands. Can octane boosters treat 95 octane fuel to 98+?

 

[Bayleaf]

I have a SL 350 2013 and I'm sure it states on the fuel cap 97 RON.

 

[Bayleaf]

I have a SL 350 2013 and I'm sure it states on the fuel cap 97 RON.

Hi , well Mercedes recommend 99 octane petrol in my M276 engine.

I prefer Shell V Power but recently Esso 99 octane will do.

Have used 95 octane as I trial on one occasion but I am General Slow so no difference in my car !

 

[sgregory124]

I am interested in this too. Considering to travel to Hebrides in my E63 and 99 octane isn't readily available over the islands. Can octane boosters treat 95 octane fuel to 98+?

Although I haven't had to use it yet, I have a bottle of Millers EcoMax (recommended by others on this forum) which will do the job. I stand to be corrected but to go from 95 to 99 (or thereabouts) you may need to use more than the directed amount.

That being said, if (and I realise that its a big if) you can get at least Super/97 RON in Scotland, you'd get closer to 99 with a booster (again, others may have more knowledge on the subject).

 

[Jibbajabba]

If that is so, I wonder why it specifies 98 RON inside the fuel flap on my R172 SLK 55? The M152 (n/a derivative of the M157) is a high-compression engine too - 12.6 to 1. I'm inclined to believe MB know best...

Same on my 2020 e63s ... 98 recommended ...

 

[E55BOF]

Although I haven't had to use it yet, I have a bottle of Millers EcoMax (recommended by others on this forum) which will do the job. I stand to be corrected but to go from 95 to 99 (or thereabouts) you may need to use more than the directed amount.

That being said, if (and I realise that its a big if) you can get at least Super/97 RON in Scotland, you'd get closer to 99 with a booster (again, others may have more knowledge on the subject).

Which Mercedes actually need 99 octane fuel?

 

[sgregory124]

Which Mercedes actually need 99 octane fuel?

If you go by the letter of the manual, none I suppose but, 98 is practically non-existent in the UK and 97 isn't suitable i'm led to believe - so 99 RON it is.

 

[f17ant]

If you go by the letter of the manual, none I suppose but, 98 is practically non-existent in the UK and 97 isn't suitable i'm led to believe - so 99 RON it is.

That’s it I also believe that’s why some AMGs make slightly more power than the factory claims (even if it it’s 5-10 bhp more)

 

[Bobby Dazzler]

That’s it I also believe that’s why some AMGs make slightly more power than the factory claims (even if it it’s 5-10 bhp more)

Quite possibly a combination of this and building a margin into published figures to account for cars in counties with lower octane and lower quality fuel.

 

[Tsb1983]

BP Ultimate or Shell V Power

 

[BRN9121]

I use 95RON on my older R129 and W208
And 98RON on my W204

 

[baxlin]

E10 in the Skoda, but E5 in the three wheeler - combination of a 40+ year old engine, and only around 1000 miles a year, it’s not worth risking E10

 

[nn7man]

Seems like Esso Synergy Supreme+ 99 now trumps Shell V Power. It is badged as E5 but actually has no ethanol added in most parts of England so will perform slightly better...

Synergy Fuels | Esso

Esso branded service stations have a variety of Synergy fuel blends (grades) to help you get to where you're going. Learn more here.

www.esso.co.uk