Gumout multi-system tune-up Vs Marvell Mystery Oil (MMO)?

[sciconf]

@Scrapyard-John

To be fair, I don’t think you sprayed the MMO directly into the intake. Seafoam isn’t going to clean the carbon that fast putting it in your fuel tank.

AFAIK it does. It does not happen in the modern cars with direct or whatever injection.

Update:
Sorry I misread the op. No it won’t get into the intake manifold. But it will get into the piston/cylinder.