Enki Motorhead Platinum Member Greenie Member Sep 22, 2021 #41 Oil in the fuel or cylinder lowers the octane rating of the fuel. It's even worse if it comes into the cylinder in droplet form, so find out where that oil is coming from; usually turbo or PCV.
Oil in the fuel or cylinder lowers the octane rating of the fuel. It's even worse if it comes into the cylinder in droplet form, so find out where that oil is coming from; usually turbo or PCV.