not too worried about expiration date.
like I said if it was in glass id go for it.
don't know what a sachet is lined with and if it breaks down over time.
Honestly,,,these will last years past expire if you have stored them properly.
I'm not telling you to use them but I know myself personally,,,I wouldnt toss them aside.
I'm using some pretty old stuff myself (eg 3yo Watson test cyp, some compounded nandrolone about a year past stated expiry). No problems. Seems fine. You should make sure the oils are clear and maybe use a syringe filter. Otoh gear is cheap.
As cheap as it is why use that old stuff?
Im a tight ass on a low budget...and even I would not inject 4 yr old oil in my muscles. Get you some new gear man!