Originally Posted By: y_p_w
Injectors are pretty easy to clean though. Even if there's varnish on the tip of the injector that might only be cleaned with a soak, shouldn't the jets themselves be cleaned out pretty well by fuel passing through? And if there's a regular use of high detergent fuel, it shouldn't really be much of an issue.
I should think so. Trav would be the guy to ask about that. Of course, I'm one of the guys, too, to wonder which is the most effective way to use these cleaners. If I'm going on a long trip, sometimes I'll toss a bottle in, and do it again when I'm home and back to normal. I can't say how much it does, other than satisfy the OCD. After all, I've been using Top Tier by it being simply the path of least resistance here for years. To add to that, the G37 requires premium on top of that. I'm not sure how much cleaning I need after running Shell V-Power NiTRO+ almost exclusively, but I do throw a cleaner in two or three times a year, be it SI-1 or Regane.
Generally speaking, I can usually make myself happy enough by just running one at a fill, and driving normally and running the tank low.