Probably quite. O2 absorbers are usually used with Mylar bags. Food saver bags aren't as impermeable.
The foodsavers get down to about 20hg of vacuum. I had a vacuum pump made for servicing auto air conditioning that would get down close to 30hg which is about as much as can be obtained on earth. Still not quite like the vacuum/void of outer space. Throw enough O2 absorbers in a Mylar bag and you could probably get close to 30hg but I doubt foodsaver bags would hold up.
Food savers work better than squishing the air out of a ziploc bag though. They double freezer storage time which is their main purpose. I'm sure using them on jars or other containers helps but I don't know how much time it adds. Probably depends on the contents. 1 1/2 to 2 times the storage time probably.
I knew Pollard would have the science behind it :-)
I don’t have any experience with how long each Works storing things, I use them for different purposes. I don’t use the food saver for long-term since the plastic bags are permeable.
I used to love their resealable bags. Until I realize that 90% of the time they lose the vacuum.
Now selling stuff in mason jars I use both ways. If I think I’m going to use something again I will use the foodsaver. It’s great for using and resealing. For things that I think are going to sit on the shelf for a while I will throw in an oxygen absorber.
The seals with the oxygen absorbers are much stronger. Every now and then one of the food savored Lids will come loose. I also noticed when I try to pry the lid off, there is a much bigger suction with the one with oxygen absorber. With the foodsavered one I can usually pry it open just using my fingers, and with the oxygen absorbers I’ll typically need a jar opener. Or whatever they are called, those little tiny can opener thingies.
I vacuum sealed pasta, nuts, and chocolate in canning jars and have them stored in the dark in our cool basement.
I figure that the dark and cool work the best, and having them vacuum sealed on top of that will make them last even longer since the glass and lid hermetically seal the jars.
I also have found that sometimes the lids let go so I have taken to putting bands on them to help hold the lid down.