Hi Jack,

Thanks for the question! Yes, you can use Sea Foam Motor Treatment in your vehicle. It’s compatible with your 2016 GMC Yukon. Just follow the instructions on the can.

Here’s a little more info on how to use it:

Wait until the tank is low (1/4 -1/8 tank), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits.

Great question, Jessica, and you’re on the right track.

I’d use Sea Foam High Mileage. Wait until the tank is low (1/4 -1/8 tank), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits, including on injectors.

Hi Dennis,

Thanks for the question!

Best practice would be to drain the fuel.

After one year though, it should still start and run fine. If you don’t drain it, I’d wait until you have 2-4 gallons, add an entire can of Marine PRO, and run it for at least 20 minutes (just don’t run out of fuel). The high concentration will do a good job cleaning up any gum and varnish that formed while the fuel sat. After that, add 1 ounce of Marine PRO per gallon to every tank of fuel. That will prevent gum and varnish from forming going forward.

Thanks for the question!

I’d use High Mileage. It’s a really good cleaner that is formulated to remove stubborn deposits and residues.

Here’s what I’d do to get the most out of it for fuel system cleaning: wait until the tank is low (1/4 -1/8 tank), add the whole 16 oz can, and then drive for at least 10-20 miles before refueling. It’s safe to add a high concentration like that and it works very well for cleaning fuel residues and deposits. Add it to fuel like this every 3,000 miles or once a year.

Good question, Rob.