Just got mine back

[Lyons]

I assume 95 is sufficient for standard GTi's?

[Top Cat]

I assume 95 is sufficient for standard GTi's?

Nope! It is designed to run best on the higher octane.
Also its another false economy. It costs more at the pump but you get better fuel economy from the higher octane. ( and more fun. )

[stealthwolf]

I assume 95 is sufficient for standard GTi's?

The car will run on 95, but as stated above, the car will run slower and with worse mpg. Use 98+ RON for the best effect. Most forumites here use either V-power or Tesco's 99-RON fuel.

[Lyons]

But it wont necessarily do it harm, just wont get the best from it?

[revo carl]

correct

[Phil Mcavity]

But if your running a map, high octane is 1st on the menu. Standard stock car , 95 ron is ok, but as a last resort.