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My ZO6 has been sitting for over 6 months on garage, I drove it today to get it inspection to renew plates and I noticed a random knocking sound.
Im hopping its bad gas, sounds like detonation/low octane I hope, Im going to remove plugs and hope none are in bad shape.
Any input will be helpful.................................
Bt the way, this sound was not existing 6 month ago.
E10 in the fuel/fuel starting to go south, and if your going to to leave the car sit from more than a month, make sure to get some stabilizer such as Sta-bil 360 in the fuel, so the water does not separate out of the fuel/E10 to cause damage/ keep the fuel from going south.
If your not using top tier fuel and since the fuel in the tank has soured, then maybe Star Tron Enzyme Fuel Treatment Concentrate may be better, since it has a cleaner in it as well.