Can I run my Kia Sorento for 400-500 miles with Sea Foam in the oil? [SOLVED]
I have a 2016 Kia Sorento with heavy carbon build up. My plan is to use Sea Foam high mileage for at least 300 miles in the crankcase and a couple tanks of good gasoline with Sea Foam in it, as well. Should I run into 4 or 500 miles before I change the oil, keeping in mind I’m adding new oil and new Sea Foam, do you believe this is safe? When I say ‘should I’, it means ‘in case I do’.
Hi Harold,
Thanks for the question! You’re on the right track.
It’s okay to leave High Mileage in the oil as long as you’d like. We typically recommend adding it 100-300 miles before your next oil change. That gives the Sea Foam enough time to circulate and clean, and it allows all the reliquefied oil residues to be drained away with the old oil. 300-500 miles is just fine. While you can add it to the fresh oil as well, I’d recommend waiting until you’re 300 miles out from your next oil change for the reasons above. [Note: never exceed one treatment per oil interval; add 1 ounce of High Mileage per quart of oil in the crankcase and don’t exceed that ratio].
As far as the fuel tank, here’s what I’d do to get the most cleaning out of it. I like to 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. One tank of gas with a high concentration like this will do a good job cleaning, but you can do it for a second tank if you’d like.

Jim D.TECH
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