I was wondering if being a werewolf extended lifespans like vampirism? Thanks for your time.

I dont think it is known, but I wouldnt be surprised if it was.
Arent werewolves supposed to heal fast and be very robust?
They are also immune to disease.

http://www.uesp.net/wiki/Lore:On_Lycanthropy is all I could find on lore books about lycantrophy.

Hmmm... maybe.

I'm 99% sure that Tharsten Heart-Fang (a werewolf in Bloodmoon) is far, far older than the average Nord, although IIRC people attribute it to magic rather than being a werewolf... but his being a werewolf is a secret, so it could go either way.

Hence 'maybe'.

Yeah, he claims to have been leading the Skaal for "generations", but his actual age is never hinted at. Nobody else really brings up his longevity either, that I recall, leading me to believe it either wasn't that long, or he gave a good enough reason that his people bought it hook, line, and sinker.

Kodlak Whitemane, in Skyrim, is a werewolf that doesn't seem to have an extended life span. Nobody mentioned anything about him living a long time, and he knew he was getting old and was going to die soon. But his lycanthropy was different than normal, so we can't say 100% for sure that normal aging wasn't a consequence of that.

But other than that, there's nothing as far as I'm aware. However, given the uniqueness of the curse compared to vampirism (forced changes, loss of control, possible insanity, etc), it's more likely that even if a werewolf aged slower, they'd more often than not end up getting killed much sooner regardless.

Actually I was close. It seems that in the Skaal village after Bloodmoon's main quest, people say "The tale is told that Heart-Fang was corrupted by the Adversary, that he had used black magic to prolong his life far beyond his allotted time. It is a sad fate for what was once a fine warrior. For now, the Skaal will follow the lead of the wise shamen of the tribe, until such a time as the All-Maker shows us who our new leader should be."

But it might just be a one-off occurrence, or maybe something Hircine did for the lulz.