Petrol issues!!! Super or unleaded??

[g10gti]

Recently my gti been underperforming slightly and noticed when sitting at lights car been a bit shuddery. Just back from garage and advised to buy super unleaded instead of standard unleaded. Is this possible or should i have been filling up with super unleaded from day one. Any advice would be great. Had engine management light on as well and has now gone off.

[snakehips]

Dunno if standard would give those symptoms, but you really should be using super anyway. Search this forum for many discussions on this. Shell Optimax seems to be the #1 choice.

[AlanD]

Its called V-Power now, not Optimax. But you get the jist.

[Gene Hunt.]

If you look inside the filler cap the sticker in there recomends 98 ron unleaded. Use Shell V-Power in mine since the day i got it.

[ub7rm]

GTI's are mapped to run to their full potential on 98 RON and above.  But unless it is very poor quality petrol, 95 RON shouldn't be causing any running issues - the engine has sensors to detect the RON rating and will alter the timing and injection sequence to compensate.  You will notice a drop in performance and probably fuel economy as well, depending on your style of driving.

[g10gti]

  thanks for the feedback i will switch to the v power and monitor the performance of the car..

[snakehips]

When I can't find Shell I'm happy to use Tesco super, which I think is the only other 99 RON out there.

[jeynesey]

When I can't find Shell I'm happy to use Tesco super, which I think is the only other 99 RON out there.

+1 and the misses loves clubcard points 


To OP, it shouldnt affect the day to day running of your car surely, only peak power performance??!

[simonkit]

 Running your GTI on normal unleaded has the "potential" of causing damage to the FSI engine..this was mentioned by the VW dealer when I bought it, not sure how true it is but I bought a performance car and want the best from it anyway so always super-unleaded for me

  Simon
 

[ilovedsg]

If you look inside the filler cap the sticker in there recomends 98 ron unleaded. Use Shell V-Power in mine since the day i got it.

Mine says 95 on the filler cap.