How to use IC5 in a 2006 Chevy Impala [SOLVED]

Thanks for the question, George. Here’s what I like to do: wait until you have about a quarter tank of gas. Add the full bottle of IC5. Drive until almost empty before refueling. That will create a good cleaning concentration.

That said, you can add it to your gas tank at any time. Waiting until you have a low tank of fuel just maximizes the cleaning efficiency.

Hope that helps!