Superunleaded Vs Unleaded with octane booster?
both my cars have been mapped running on super-unleaded. on the rare occasion i have put normal unleaded in, they dont like it (poor idling, pinking, and generally dont feel as perky)
now that the price difference between normal unleaded and super is stretching more and more (now getting to be 8 - 9p more per litre) i'm thinking i might be better off using normal super-unleaded and putting octane booster additive in?