dcgt05

I've jumped on the B-12 bandwagon and picked up a can as well as a small bottle of the B-12 for humans for good measure. Just waiting for the tank to empty before I add it. Directions say to use the entire can for tanks 15 gallons or more but I see a number of people adding only half a can. Comments?

Question from a noob having only ever owned two practical Hondas and never having used any treatment of any kind: What's the story with these additives? They help clean and lubricate the engine components? How necessary is this and what's the difference between using an additive and never using one? Just got myself into an '05 Legacy GT but still have my Honda Element. Will I notice any difference using an additive in the Honda (very simple practical car) or is it more of a performance thing like what I've gotten myself into with the turbo Subie?