I think every VW made since 74 can run on unleaded of the correct octane without modification.
On another note my Seat Ibiza GTI and Audi seem to run OK on the ULP plus stuff that I can get up near Sir Don Bradman on Marion road. I have to admit that since chipping the Ibiza it runs much better on 98 like ultimate and V power.
My driving is so varied, traffic as well as open road, that it is tough to say whether one gives better economy over another.
Gavin
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