somnoboy

Does anyone know what the shelf life of oil is?

lexus114

sealed,or unsealed? Sealed,I would say its good for years. Unsealed....not so much.

somnoboy

Unsealed. Had a half-quart left over after my last change. I was wondering if I could use it at my next change six months or a year later.

mandyfig

You should be good. As long as you keep them lid tight, a year will not affect it.

Nick318

My bet is a couple of years b/c oil is thick and viscous so its chemicals will not breakdown as fast as water.

rcy

From the folks at Pennzoil

"Oil shelf life varies depending on storage conditions. Under normal home garage storage conditions, you can expect a minimum storage life of five years."

rcy

Just curious as to what chemicals in water break down when it's stored?

RX330inFL

Ever notice that bottles of water have an expiration date?

kickin8

iTrader: (1)

but we are drinking the same water from million of years ago???

lexus114

As with any oil that sits for a period of time, shake the bottle real well before putting it in your car. Sometimes the additives disperse.

salimshah

Expiration is for human/pet consumption. Bacteria and other microbial stuff can grow and survive in water. And the container material can leach into the water.

For engine oil, I am willing to bet the container would deform and spring a leak before the contents become un-usable. Covered container would keep the dust out and the only unknown part is the life of various detergents (additives). It took millions of years for the dino oil to be formed.

Salim