Oil Choices

[Andy]

Seafoams eats away grime yes, but can cause leaks because that grime builsd up around eroding gaskets and "seals" them. When seafoam eats it, it causes leaks.

How does seafoam cause a leak when used through the intake? There's no gaskets to harm, except maybe the intake manifold gasket - but those are generally composite and pretty tough to eat through.

He's referring to Evan's post about it quieting lifters when added to oil. I've done it and castastrophe has not ensued.