What's the rule of thumb for how and when to put in fuel system cleaner into your engine?
I see that some gas stations even now have "add it at the pump" where it will put in some fuel system cleaner into your tank.
Thoughts? Brands to use? how often?
I see that some gas stations even now have "add it at the pump" where it will put in some fuel system cleaner into your tank.
Thoughts? Brands to use? how often?