I'll start by requesting that this NOT be a discussion of premium vs regular, as that is being hotly debated in another thread. I'd like to focus solely on regular gas here, but examine the benefits of optimum/higher detergency. I'll also state that a) I know that Honda recommends top-tier in...

I thought you folks might like to know what I've learned about gasoline detergents. The EPA, for emissions reasons only, not engine health, set a minimum level of detergent that must be added to gasoline. The level was lower than some oil companies were adding at the time. An unintended...