valve stem seals

[sho4life]

Does seafoam ruin them? It says there are three ways to use it. In the oil, gas tank and intank. I know if you use it in the oil you should get an oil change not too much longer afterwards.

I had an old engine that sat for awhile and high mileage oil seemed to help but just dont want to make it any worse

 

[lowc]

im sure if it ruined them they would not tell you to put in oil. ive ran it in my oil a few times and has been in there for almost the whole 3k and havent had any issues

 

[itwonder]

Seafoam won't hurt. High Mileage conventional oil will help. Stay away from synthetics if valve stem seals are leaking.

 

[91PDXmocha]

Castrol GTX high mileage . few oil changes with it did better on oil consumption that any additive honestly. Ran a 150k motor that was black as shit when I got it. 3 oil changes later with castrol when I did the valve cover gaskets could already see the HUGE difference it made .

 

[firebat45]

They tell you to change the oil for two reasons, because SeaFoam doesn't really work as an oil additive, it's a cleanser, and because it gets a bunch of crud off the motor and into the oil. It's like changing dirty dish water.