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Discussion Starter #1
Since no other petrol is worthy of our engines ;)

As petrol prices are rising again, I switched from being a loyal Shell customer to Tesco Momentum 99 RON. After a very bad experience in my Golf R, verified with three different garages, I thought I should give it a try in the GLC43.

Well well, I am very surprised. My GLC43 seems to love that stuff. I find it even more responsive and super smooth compared to Shell when pushing it. A very different experience than with my Golf R. Quite nice on the wallet as well :)

Has anyone else had a similar experience...
 

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Been using BP ultimate and shell in mine as they are local and not found any difference between them, would us tesco momentum if could obtain it locally.
 

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The UK handbook states:

"Only refuel using unleaded petrol with at least 95 RON", 97 RON BP ultimate is fine.
 

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Discussion Starter #5
The UK handbook states:

"Only refuel using unleaded petrol with at least 95 RON", 97 RON BP ultimate is fine.
The filler flap states RON 98 (RON 95) that means less than 98 by exception if you really can't get anything else....It is tuned for 98, but runs as a minimum on 95.....Anyway your choice, I'm not buying one secondhand anyway....:p
 

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Perhaps 99 ron is wrong for the 43 as well!!!!!.
 

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Discussion Starter #7
Perhaps 99 ron is wrong for the 43 as well!!!!!.
LOL That is not how RON indications work. You are correct that for many engines it is waisted, in my understanding especially for naturally aspired petrol engines that if they are tuned for RON95 it is a waste to put the good stuff in ;) However for higher performance engines they do get benefit from going higher, but in order to get the performance out of it you should run it as a minimum on 98 in this case....Which is Shell....Momentum just goes higher, and there are some independents that supply 100 as well.

Kind regards,

JP
 

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All subjective JP, have seen many discussions on which fuel to use. Saw one where people were saying fuel sold at supermarkets was inferior, people were getting very heated.
A guy who had worked at the distributors came in and informed us that the fuel was taken from the same tanks at the depot.
You seemed to indicate that the tesco fuel was "even more responsive and super smooth compared to shell" I have used both shell and BP and not noticed any difference whatsoever as car is super smooth and responsive with both. When I get chance I will fill up with tesco momentum to see if I can notice anything but doubt if I will.
BP have changed their ultimate range to ultimate with active technology and it is supposed to keep the engine cleaner.
 

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We need someone like that engineering explained guy to go through this and give hard numbers so we can put it to rest lol

It's going to be a never ending debate and it always will be... until we're all flying around in hovercrafts at least.
 

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You are right Klass, in 20 years we will be debating what is the best electricity to use.
 

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All the years of seeing Shell commercials and Shell with motorsports and the overall automotive industry, I have a natural tendency to go Shell regardless of what vehicle I have.

Shell all the way.
 

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It's going to be a never ending debate and it always will be... until we're all flying around in hovercrafts at least.
why would hover cars end this debate? people will just change the debate from fuel to battery manufacturer. don't underestimate the capacity for humans to argue! haha.
 
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Lol you guys are right, why did I have that speck of hope hahaha!

It'll either be battery, charger, someone will end up saying their electricity is better than the other guys !
 

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Has to be British gas electricity or it isn't any good!!!!. - remember you read it here first.
 

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Discussion Starter #15
The RON is not subjective, nor is the engine tuning to a certain number ;) It is measurable....What is the variable is peoples ability to perceive what they are experiencing. From that perspective we can only share our own experiences. I do think that if you have the engine model you should really fill it up with the fuel as per the recommendations when it is available over prolonged use. But hey as I said I don't buy yours second hand so don't really care what you do to yours....
 

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Are you ever wrong dejongj?, don't know why you seem so bothered as to what I do with my car.
 

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The RON is not subjective, nor is the engine tuning to a certain number ;) It is measurable....What is the variable is peoples ability to perceive what they are experiencing. From that perspective we can only share our own experiences. I do think that if you have the engine model you should really fill it up with the fuel as per the recommendations when it is available over prolonged use. But hey as I said I don't buy yours second hand so don't really care what you do to yours....
Have you done any measurements using the different grades and come to a solid result and answer?
 

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Fossil fuels are so last century. Dilithium crystals and flux capacitors are the way forward.
 
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My 43 now has 5500 miles on the clock and I thought I'd try using regular unleaded and see if it makes any difference.

Well, I've now driven 660 miles on regular fuel, and the economy is exactly the same at 22.6 and I can feel no difference in performance. Sure, if I was taking it for a track day then I'd want the super stuff, but other than that am struggling to understand why I have been paying 10p per litre more for fuel.

Perhaps someone can enlighten me if using regular fuel causes any damage to the engine? I'm thinking now that perhaps every 3rd or 4th fill could be super, but even that I'm unsure about.

Be interested to hear views of owners with more knowledge than me on this subject.
 

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Andy

I think that you are correct that it probably makes no difference using 95ron not 98, not an expert but apparently the car adjusts itself to the fuel used. It is YOUR car and if you are happy then that is what matters but remember I was reprimanded for using 97ron instead of 98!!!!!.

How are you getting on with the car I am delighted with mine, different world regarding quality to my discovery sport.
 
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