When I bought my car this past Oct. it ran like poo. stumbled and simply wouldn't accelerate like I felt it should . It had been sitting for the better part of maybe 2 years with basically nothing but a start and run a few times for 5 minutes

I poured a bottle of seafoam in it with a full tank of 100 octane and by the time that tank was gone. it was running much better.

repeated it all for a 2nd tank and by the time that tank was gone, It ran A LOT better ,,,aka pretty darn good.