ANd I've used XtraPremium with no issues. Tried filling 500rs of Power for tyhe first time, and this happened.[/quote]
Extra Premium is 91 octane&Speed 97 is 97 octane. You're right-97 octane is not recommended for the 1 5. Extra Premium has additives which contribute to making the engine smoother, increase mileage etc.But to really feel the difference, you need to get it filled atleast 4-5 times.
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