Fuel & Oil Additives to your Truck/UTV/ATV?

[cnelk]

What kind - if any - of fuel/oil additives do you all use in your vehicles?
[Typically, not new vehicles]

It seems like Sta-Bil is a common fuel additive that works good.
Seafoam has been around for a long time, so has Marvel Mystery Oil

Any good results? Bad results?

 

[S-3 ranch]

44K every 100 hours for clean fuel injection

 

[PNWGATOR]

Startron in all non ethanol straight and mixed fuel.

 

[Scoutfan]

Mechanic in a bottle for all smaller carbonated engines.add some at storage and first tank out of storage