[Isleaiw]

I know the car says 95 RON is required but does anyone know if that is what the car produces it's quoted power output on? Does anybody use v power, momentum, or whatever to good effect?

TIA

 

[christuffleyQ5]

I use Momentum 99 in my TFSI Q5. I find after a few tanks the average mpg has risen around 3mpg and the engine feels very smooth and responsive.

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[Isleaiw]

Thanks Chris. I used Momentum, have used Sainsbury's super unleaded, and a couple of the others but haven't really spotted a difference yet. Will persevere with the momentum for a bit longer - shame Tesco isn't a more convenient option!

 

[christuffleyQ5]

Thanks Chris. I used Momentum, have used Sainsbury's super unleaded, and a couple of the others but haven't really spotted a difference yet. Will persevere with the momentum for a bit longer - shame Tesco isn't a more convenient option!

I've got a Tesco petrol station right near me so it's convenient. I had to fill up with Sainsbury's 97 octane once and didn't notice much of a difference. There are some that say it makes no difference but for the extra few ££ a tank it's worth the bit extra IMHO.

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[Kell]

It will normally take three or four tanks of a particular fuel before a car will begin to show any difference.

The ecu needs time to react.

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[neilp]

I agree I have used super unleaded for the last 4 tank fulls and all of a sudden my mpg has risen, particularly noticeable on the shorter day to day trips I’m doing. I will certainly continue using the higher octane petrol.

 

[Helisupp]

I was of the opinion when using super unleaded on my Golf GTI that the intakes coked up less (the GTI suffers badly from intake coking).

Maybe wrong.............but only super unleaded goes into my TSI as a similar engine type.

 

[Kell]

I used to work (indirectly) for one of the major premium fuel companies. I've seen (some of) the facts and figures and test results.

The way it works (UK) is that most of the 95 RON fuels from the likes of Shell, Esso, BP et al will prevent your valves from coking up any more than they already have.

The higher octane (or cetane) offerings always have an additives package which includes cleaning agents that will remove any residue that exists and can (in some instances) restore performance back to factory.

Personally, I'd never use 'normal' fuel in any car and would always go for for the best possible fuel with the highest rating.

The only times I've not done that in over 20 years have been when I'm almost out of fuel and have to stop at some pokey garage that doesn't have the option. And those time I only put enough in to get me home or to the next decent garage.

We tend to keep our cars until they're 120,000 miles and up. And in the grand scheme of things, it's not a huge extra expense. So I think it's worth it. Others may not.

 

[SQ5 Steve]

In my 2018 SQ5 i use 95ron BUT only from the likes of Shell,BP,Esso,Gulf etc.

 

[Old_Geezer]

In my 2018 SQ5 i use 95ron BUT only from the likes of Shell,BP,Esso,Gulf etc.

Yes! Comes from the same refinery or storage facility as everyone purchases from. Different companies use different additives. Many years ago I was the RAF oil/fuels analysis laboratory specialist that used to batch test fuels as well as oil spectrometry on helicopter transmission/ gearboxes. There is no difference with any of them except that they use different additives per tanker load for who ever is having the fuel delivered.
I met a tanker driver last year who was filling up the Gulf station down the road from us. He said his next load and he showed me his delivery schedule was going to be ASDA. Later on he was filling up Sainsburys at Oxford.