anybody ever try those? it's call Pro-Gard, i think you just pour it in your gas tank.. any good?

 

I'd only use Techron .....made by Chevron.
3-4 times a year I've run in various auto's and my bike. Good stuff, reccommended even by several manufactures I think. Get it cheapest (as far as I know) at Walmart.

 

BG44K is the best thing. You can get them at local Napa autoparts store. I recommend use it once a year or every 12K+ miles.

 

BG. Supposed to be the best on the market, and delaerships use it as well.

 

I heard Lucas is good too.

 

The pro-guard stuff from costco is a "fuel system cleaner" that uses Techron as one of its additives. This stuff is not good.

Now, if you get Techron concentrate...that stuff is good! =) The concentrate costs about $5 for a single bottle...Definitely worth using if you've got a bit of a dirty fuel system from say...pumping gas right after the station's tanks got filled....