Ronald_H
Don't call me Ron
Never, ever throw away film. I have not found film I could not use so far.
My experiences:
Vanilla 35mm C41 (Kodakcolor Ultra & Fuji Superia) , 200, 400 and 800 up to 7 years expired. Substract a stop sensitivity for each 2 years outdated. Results are consistenly excellent, no color shift to worry about. I buy up all moderately expired film I can find. Been shooting C41 for 50 cents a roll for years now.
However, I once shot a roll of 6 years expired Superia 800 at box speed, thinking it was a fresh roll. Color cast was severe, grain quite evident. Normally the picture would be considered unacceptable. Postprocessing in Photoshop fixed it though.
35mm B/W can be much older still. I processed fresh and 5 year expired FP4+ in the same tank and couldn't see any dfference.
I never used expired C-41 120, but I am currently using a batch of Agfa APX-100 and 400 in 120 format that was 10+ years expired. For some reason this has lost a lot of speed and base fog is immense, especially for the 400. But if you compensate in exposure and development, again perfectly usable.
My oldest roll was a 19 years expired roll of Tri-X. Shot it a box speed and had it developed at a lab. This was before I did it myself. Definitely very grainy and a bit dark, but they made it to the website of the artist iI shot that night.
Here is an example of that really expired roll of Superia 800. Shot at box speed, drugstore development. Lots of PP, sure, but still looks nice.

Green rat look lowrider VW beetle - Beautiful Budel 2011 by Ronald_H, on Flickr
And severly expired AGFA APX-400. Shot at ISO100, developed normally (7min @ 20 degrees) in Kodak HC-110 solution 'B'.

East Anglian railway museum by Ronald_H, on Flickr
My experiences:
Vanilla 35mm C41 (Kodakcolor Ultra & Fuji Superia) , 200, 400 and 800 up to 7 years expired. Substract a stop sensitivity for each 2 years outdated. Results are consistenly excellent, no color shift to worry about. I buy up all moderately expired film I can find. Been shooting C41 for 50 cents a roll for years now.
However, I once shot a roll of 6 years expired Superia 800 at box speed, thinking it was a fresh roll. Color cast was severe, grain quite evident. Normally the picture would be considered unacceptable. Postprocessing in Photoshop fixed it though.
35mm B/W can be much older still. I processed fresh and 5 year expired FP4+ in the same tank and couldn't see any dfference.
I never used expired C-41 120, but I am currently using a batch of Agfa APX-100 and 400 in 120 format that was 10+ years expired. For some reason this has lost a lot of speed and base fog is immense, especially for the 400. But if you compensate in exposure and development, again perfectly usable.
My oldest roll was a 19 years expired roll of Tri-X. Shot it a box speed and had it developed at a lab. This was before I did it myself. Definitely very grainy and a bit dark, but they made it to the website of the artist iI shot that night.
Here is an example of that really expired roll of Superia 800. Shot at box speed, drugstore development. Lots of PP, sure, but still looks nice.

Green rat look lowrider VW beetle - Beautiful Budel 2011 by Ronald_H, on Flickr
And severly expired AGFA APX-400. Shot at ISO100, developed normally (7min @ 20 degrees) in Kodak HC-110 solution 'B'.

East Anglian railway museum by Ronald_H, on Flickr
