how much should I use Silkolene PRO FST Fuel System Treatment?

the weather really getting cold now and I read that silkolene really help for cold start and clear the fuel pipes and carb etc, so I am planning to get one but I checked out the bottle and it says 100:1 and 50:1, so anyone used? What is the correct ratio to use?

many thanks

never used it,
stp fuel cleaner is what i use, chuck a 200ml bottle into a full tank every 3000 miles.

I gave up using that stuff - bought 5l of IPA - isopropyl alcohol - (99%) but use that for carb icing more than cleaning the system. Works out a lot cheaper.

Use 1%, so that would mean 160ml for 16l tank, 190ml for 19l etc

Thanks for the replies.

Also, i was told to use the more expensive petrol in the winter will help the engine too. I am willing to do so but only if it really have the effect on my 1992 ZXR 400 and 1999 r1. I know the petrol have a higher RON and burn hotter but does it really help with my old bike, I’m sure it works with the new bikes.

I don’t use expensive petrol in winter.

I don’t use expensive petrol…