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Hello I have a 2013 Kia Rio and I noticed that I had a Small Engine knock at lower speed while I was getting up to 55 MPH. I Have almost 4000 miles on it now and Bought some gas that I believe was bad.
I passed a other car the other day I dropped the Car down into 4th gear and had it doing 80MPH and Now I dont notice as much engine Knock or Rap. I use Amsoil and The Car is almost due for it s First Oil Change, however Amsoil Also makes a Really Good Fuel additive. My question is Kia suggests a fuel additive every 7500 miles, If I use the Amsoil to eliminate engine rap or knock will it void my warranty.
I passed a other car the other day I dropped the Car down into 4th gear and had it doing 80MPH and Now I dont notice as much engine Knock or Rap. I use Amsoil and The Car is almost due for it s First Oil Change, however Amsoil Also makes a Really Good Fuel additive. My question is Kia suggests a fuel additive every 7500 miles, If I use the Amsoil to eliminate engine rap or knock will it void my warranty.