– Why are you supposed to put high octane gas in some (typically luxury brand) cars?

Question

– Why are you supposed to put high octane gas in some (typically luxury brand) cars?

In: 21

Answer 1

It’s necessary for engines with high compression ratios so the fuel doesn’t prematurely combust before the spark plug fires. You see this more often with these sport and luxury vehicles equipped with more powerful engines compared to typical vehicles.