I use a bottle fed or spray can IV cleaner every year. Just follow the directions on the can.
I've used:
Shop Power Foam® at AMSOIL. Find premium synthetic oil, filters and more online. Fast, free shipping available.
www.amsoil.com
Sea Foam Spray Top Engine Cleaner & Lube works through an engine’s upper intake to clean harmful deposits from intake valves and chamber areas.
seafoamworks.com
Royal Purple Max-Blast(possibly discontinued but NAPA has it)
Do you want to remove carbon buildup from the intake valve of your GDI engine without the expense of a costly tear down? CRC GDI IVD® Intake Valve & Turbo Cleaner is the solution you need! This intake valve cleaner uses a specialized formula to break down carbon deposits that choke your...
www.crcindustries.com
gumout.com
lucasoil.com
https://www.berrymanproducts.com/products/maintenance/berryman-intake-valve-combustion-cleaner/ (this replaced the metered HEST)
STP® Pro-Series Intake Valve Cleaner is a DIY intake valve cleaning solution designed to remove hardened deposits without a costly engine teardown.
www.stp.com
www.lifeautomotive.com
No brand loyalty here so I recommend alternating among the brands available.
Like RoyalPurple, the Lubegard 9000 has been discontinued.
And, it usually will take a 2nd person to maintain engine rpm as some products will cause engine to stall.
I do recommend a quality PEA/PIBA/equivalent for the tank prior to performing the IVD cleaning. Basically, I want the pistons/combustionchambers/injectors to be as clean as possible. And, since solvents are the nemesis to octane, I recommend to then fill the vehicle up with premium fuel to reduce detonation during/after the usage of the above products. After you performed the cleaning, soaking, and a gentle ~20 minute drive to clear out the product, I'd then recommend an oil/filter change.
If you are not a do it yourselfer, then find a shop for :
www.bgprod.com
www.enginecarbonclean.com
Engine decarbonizing station that burns off and helps eliminate carbon deposits via a hydrogen pulse. Helps Clean most of the main engine components without the need to dismantle: injectors, EGR valve, turbocharger, DPF, etc.
www.carboncleaningusa.com
It takes a lot more than an oil change to help keep your car running its best. That’s why Valvoline Instant Oil ChangeSM provides services to help you maintain performance and avoid costly breakdowns.
www.valvoline.com
Wynn's De-Carbon Foam™ softens and dissolves difficult to remove intake valve and combustion chamber deposits in MPI and especially GDI engines.
wynnsusa.com
Wynn’s® Clean-SweepTM Intake/Induction Cleaner is specially formulated to attack carbon build-up on intake valves and in combustion chambers of GDI engines. This exceptional product can remove even the hardest baked-on carbon.
wynnsusa.com
IV/port cleaning is nothing new. Have used products since the 1980's(usually to make a vehicle pass emissions), especially after the quality degradation of EPA fuel in ~1992ish, and the reason why toptier and those PEA FI products was developed and marketed.