Cupra on normal 95 ron fuel

[dw911]

I always use 98 as recommended on the flap UK cupra, if I ever have to put in 95 I don't rag it
If yours says 95 on the flap run it on that it will be fine, seat change perramiters/designs for all markets to take accountant of the availability or not of higher octane fuels. although all modern cars regardless of market designation will self adjust up to a point.

People get very confused about octane rating or RON number – it’s got nothing to do with power or your car going faster, altogether it does allow the engine designers to squeeze out a little bit more power on high performance engines like these because of 98 Octane 's higher resistant to ignite at the wrong time without a spark - , and everything to do with the resistance to combustion.
98 Octane delivers 98 % of the combustive resistance of real octane.
95 Octane delivers 95 % of the combustive resistance of real octane


Personally I wouldn't dream of using a lesser oil than seat recommend - so why would I use a lesser fuel than Seat recommend

 

[Alunakis]

Hi,
I have a little dilemma. I read the Seat, Audi, VW owner manuals, forums from UK, France, Italy, Germany referring the recommended (best) petrol for your engine. The fuel with a higher RON can be used with no problems, but nothing about any benefits using this high octane. In my Skoda owner manual says that we can use higher octane, but there is a note where is specified that this can bring power increase and low consumption. Aren't the same engines in VAG group?

 

[andycupra]

not what the dilemma is.
you can use, 95, 97, 98, 99 RON fuel ok. The ECU will adapt fine.

Technically the higher octane fuels could give improved power and economy, but not to an amount where most people would notice.
'super' unleaded fuels often also have increased additives which might clean engine internals more than premium, but having said that most premium fuels in the EU are good quality.

 

[honziss]

Aral Ultimate 102 also works fine

 

[Alunakis]

I didn't understood why ONLY Skoda write in owner manual that using higher octane brings a few hp and low consumption and the other VAG manuals didn't mention about this increase hp/decrease consumption. I also feel this improvement, even though my engine has only 140 hp.
@andycupra: You are right:" but not to an amount where most people would notice." Have a nice day.

 

[Seastormer]

I didn't understood why ONLY Skoda write in owner manual that using higher octane brings a few hp and low consumption and the other VAG manuals didn't mention about this increase hp/decrease consumption. I also feel this improvement, even though my engine has only 140 hp.
@andycupra: You are right:" but not to an amount where most people would notice." Have a nice day.

My SEAT manual states that 98 is the recommended fuel, but using 95 will give slight power loss. Is that not just a different way of saying the same thing.

 

[Alunakis]

@seastormer,
Yes, I think you're right. My intention is to keep this car for minimum 6-7 years, so I take care of engine by using high octane. I am not interested for more power, I am 50 years old so I have a peaceful driving style. That "min.95 RON" is marketing, it helps selling cars, that's my personal opinion.