Oil Shelf Life

[BCreekDave]

Originally Posted by SuperNovaSS

Water will travel through the sealed plastic container? If so, won’t the little amount of water evaoarate out of the oil once it’s in a hot engine?

Thanks,

Jason

Yes, it will and it depends on the humidity and temperature.

Most all materials have some level of WVTR...water vapor transmission rate. The water molecule is very small and can pass through the pores of the plastic.

AC systems have desiccant due to the hoses and rubber seals. Folks are surprised that a system that has around 150-300 psi pressure still lets water in.

The water will burn off and there are detergents and additives to deal with it. For the daily driver I wouldn't worry about it.