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<x-flowed windows-1255>Daniel Baum wrote:
Sounds like detonation to me. Very serious. Back off the throttle til it
stops when you hear it.
I always either back off the throttle or downshift when this happens.
To Check if this is indeed your problem, buy premium the next time you fill
up. If the problem goes away, it is indeed detonation.
I had wondered whether I needed a higher-octane petrol but I would be quite surprised if this is the case. I use 96 octane. Since they stopped selling leaded petrol over here a couple of years ago, the 96 octane has had a potassium additive added to it (I think this is what they call LRP in England). Other options are 95, 98 and 99-octane unleaded. Surely it shouldn't require 99 octane?
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