Super or regular?

[neilgcal]

Can anyone who has got a MKVI GTI check on the fuel flap and see if it says 95Ron or 98Ron?

Cheers

[neo66]

Mk5 tho, not mk6, but hope it helps anyone anyway!

[Egbutt Wash]

My Mk5 says 95 Ron on the fuel flap (the same sticker as the Mk6).
That's what it gets in the UK.
When I'm on the Isle of Man I use Shell expensive stuff.

The engine management system is very clever, stuffed with sensors.  It just adapts the fuelling and ignition for whatever you put in.  The expensive petrol seems to keep the power at peak under all conditions, the 95 Ron can sometimes give a reduced power now and again (if one of the knock sensors reports knocking the ECU acts to look after the engine, straight away).

The biggest difference was after running a full tank of Morrisons I filled with a tank of Asda.  The car was really slow for about 15 miles until the ECU had sorted out a decent fuelling/ignition plan.  

Next tankful will be Shell expensive on the island.  You need every hp you can get to enjoy roads with no speed limit.

[jaydubveedub]

I always use Tesco 99 octane super unleaded. The car runs much better on it, and it seems to be better at the top end.

[ub7rm]

My Mkv says 98 on the petrol cap too....

There isn't really any debate on this.  Its set up to run at optimum power and fuel consumption on 98 or better.

You can use 95 but you will loose power and fuel economy. 

On non 98 optimised (non FSI engines) I agree super is a bit of placebo / waste of money bar the effect of the additonal detergents but it is very noticable on these cars if you don't use it.

[Egbutt Wash]

My Mkv says 98 on the petrol cap too....

Mine says 95 not 98, just like the photo by Willzie.
Might be worth checking the flap.

[AlanD]

Strange how some MK5s say 95 and others say 98?



Note mine says Super PLUS Unleaded where as yours only says Super Unleaded. Strange . . . . .

[ub7rm]

My Mkv says 98 on the petrol cap too....

Mine says 95 not 98, just like the photo by Willzie.
Might be worth checking the flap.

I did you numpty, how do you think I knew that?!

[ub7rm]

I happen to have a brochure for the mk6..

And actually unlike the mk5 (at least the early mk5's it would seem) it doesn't state that 98 is required to achieve the optimum power etc  :embarassed:

However, if it still uses FSI I can assure you that 98 makes a hell of a difference. 

[Egbutt Wash]

The gadget show ran a test comparing supermarket, BP ultimate and Shell Optimax on three cars, a slow french car, a Mk5 GTI and a Subaru.  The test is here...

http://www.youtube.com/watch?v=dDHwCWdrtdg

I'll not spoil it by telling you the results.