I haven’t seen this discussed but I always thought that it was best to use a fuel system cleaner like Techron when you’re doing just every day stop and go driving in which a tank of fuel would be consumed over a longer period of time. My thought was that this is better than just putting it in prior to one long distance drive in which it is entirely consumed in one trip. Thinking the stopping, turning the engine off, letting it sit overnight soaking etc. would allow the cleaner to perform its desired function better. Does that make sense? And let me know if this has been discussed. Thanks.