Quote:
Originally Posted by Keselke
I get about 200km a tank with 87
and about 350 with 91
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Something is seriously wrong with your engine
, or your calculator.
20 years ago EFI engines had octane sensors (knock sensors)that adjusted timing to accommodate different octanes.
If you engine was knocking you would know it, it's very obvious.
Higher octane will not make more power and remember, the premium gas goes stale because it doesn't sell very fast.