Again, won't do diddley squat for carbies.
I'll amend my statement from:
If you really NEED to use it because someone said so, fill up with Chevron every 5th fill-up and Bob's your uncle.
To:
If you really NEED to use it because someone said so, put Techron in any time you want to. It'll make YOU feel good.
IMHO, Techron is the best thing since sliced bread for FI systems. Chevron had the leg up for a while but the other fuel producers have a similar product in their fuel now. A thought, many of the "cheapo" stations are selling one of the major brands of fuel or the other but can not advertise the additives due to trademark concerns. Up here in the SF bay area there are a couple of refineries, Tosco & Tesoro, and the branded tankers pull in and out of them all day long.
BTW, alcohol, whether ethanol or methanol is great in gasoline because it's hygroscopic. Plus, you can get more HP and have the engine run cooler on 100% alcohol, however your MPG goes WAY down.
