seafoam

how long should I run seafoam in crankcase before oil change and can I put some in the PCV hole like the can says

Just follow the directions on the bottle.

They're the ones that have done all the research and studies

A customer service rep instructed me to put 1/3 in the gas tank, 1/3 in the crankcase, and 1/3 through the PCV valve. I have ran it for about 1500kms(950miles) in the crankcase and it did help, I also had no problems.

To sea foam:

Run engine to operating tempreture

Pull hose from brake booster

Have someone hit the gas pedal and maintain around 1000 RPM

SLOWLY pour 1/3 can into brake booster hose. Immediately shut off engine for 1 hour

Pour 1/3 can into crank case (do oil change in about 500 miles)

Pour 1/3 can into gas tank.

When hour is up start truck and go for 3-4 mile drive (do not be concerened if you have a big assed white plume of smoke following you, this is normal)