'Fuel Cat' is utter junk - complete snake oil. No scientific evidence whatsoever to back it up - just a few testimonials from the odd user who thinks it might have worked for them.
Sorry if I sound harsh and offend anyone - but I'm a scientist who knows cod science when they see it.
Not ONE scientific journal has ever published data on it ('cos there isn't anything scientific about it!) and the 'science' on their website is utter junk.
If you go to Fuel cats website they have a 'Results' page to 'show' it works... Go here:
http://www.fuelcat.co.uk/test-results.phpBloody hilarious! Have a look at the Prague file....... Or go to the Coca Cola one. Prague is unreadable, and Coca Cola test done on 20 trucks for three months... but only 14 were available on the test day three months later to compare! Doesn't even say which sample the 14 trucks were from! Data blurry and hard to read and the numbers are utterly insignificant (and probably untrue anyway)! Lots of "my mate reckons it works with his car" s*** to back it up in testimonials......
Have a look here - sums it up better than I could:
http://fuelcatisascam.selfip.com/fuelcat.htmlTrouble is, people put them in their bikes/cars and quite unsurprisingly cover many happy miles afterwards... as they would have done without using one. This 'proof' that they work then gets passed on as gospel. Please folks, don't fall for it.
Most A10 alloy head seats are probably hard enough to cope with unleaded, and will go on working for years (mine did). Cast iron, maybe not. Either way, use your bike for thousands of miles, and when you've had to adjust the valves quite a lot, take the head off and get it done properly with new seats. Don't worry that the seats "might wear down" as you'll easily know when they have done, if they do.