Opened container

[Big Jim]

You will be fine.

 

[Vilan]

A few months ago I did a flush and added some coolant from an opened jug that has been in the garage at least 10 years. No problems so far.

 

[Ray H]

Presuming you recap the container snugly, no problem. I suspect the reason the antifreeze blenders use a foil seal is to retard little retards from opening the stuff in the store and drinking the sweet, pretty fluid while daddy's checking out the legally blond check-out clerk. (Make sure you store the recapped jug high enough to prevent a real-life accident if you have curious small children or pets in the family. Ethylene glycol is very toxic stuff. Three ounces of antifreeze concentrate is fatal for an adult human male. Whiskey is an antidote in an emergency because ethanol binds with ethylene glycol. Time is crucial to avoid complete kidney failure. You'd still need to seek proper medical treatment for the victim.)

 

[Finklejag]

Thanks guys. The Nissan stuff is $$$. I wouldn't want to buy another gallon if I didn't have to.

 

[Finklejag]

I bought a gallon of Nissan coolant for my Sentra. I topped off my reservoir with coolant and distilled water. It was a little low after 15,000 miles. I'm going to flush my system at 30K. My question is, can I use the open bottle of coolant? Does coolant go bad once opened?

I will probably take me about ten months to hit 30K.

Thanks