I read that it is only required if you are NOT using a top tier gas, Costco is rated as a top tier gas so I may put it in once a year.Hyundai suggests "fuel injector cleaner" on every service interval, is this the bottle you can buy at part store and diy? What to look for? Driving a 17 1.6t.
I use Shell Fuel in all my vehicles i will use V-Power every 2-3 rd tank in the S.F. makes a difference in start up idle its smooth as silk on every start if someone uses a top tier fuel like shell V-Power theres no need to use fuel Injector cleaner at all.I think most fuel, if not all fuel in Canada, is well enough regulated that injector cleaner is not need. Many years of car maintenance without using it and without any problems. If I had a problem that I thought fuel injector cleaning might help, I would try it, but until then I keep my money in my pocket.
I say don't fix what ain't broke.MY concern now, after having looked in to it lately, is how the intake valves can be cleaned given that this is GDI.