Fawn, petstore, 18 months, multiple tumors  (tumors hemoraged).

Gizmo...............36 months(myco)
Muttley..............42 months(myco)
Sandy...............24 months(suspected heart attack)
Tyler.................30 months(tumour )
Ziggy................25  months(unknown)
Bandit..............28 months(pituary tumour)

How long do rats live? The first one i had lived for 3 years... is that normal?

fudge........ female bout 9 mths unknown causes.

Gosh......... Ive never owned a rat but the thought of them passing away before I have even got them is awful 

We just lost our first rat rat.
Fern, Female Hooded rat 23m - Stroke and Respitory problems.

Here is my oldest.........43 months and still GOING

He is my first rat that I got and he has outlived his offspring, his wife and manymore.
I cant beleive he is still going.
Gidget died at about 40 months
The other ratties died all about the 24 month mark.

Here is their info:
Both are Double Rexs,  Dumbo eared
They had one litter together (along time ago)
I got them at a Petstore(before I knew anything about rats)
They were on pine for the first few months then I grew a brain and got the good stuff.
They never got sick. Gidget didnt grow a tumer till her last couple of months of life.
I had to put her down because she lost her mind. Yes..... It was like she didnt know who we were and she bit up Tempilton''s back foot and half of his tail. She did a number on him.  She also bit us. We knew it was time to put her down.

I will let you know when he does pass away....If ever

Ok, well heres the rats I have owned and lost so far =(:

Whisky  - F - 26 months - Rescue - Got a tumour and lived for another 6-8 months before passing away

Miles - M - Pet Store Rat (good conditions) - 34 months - Died of Old Age

Sabriel - F - Accidental Litter - 1 month old - Freak Accident, Cause Unknown

Whiskers: Male, from a breeder. Died of pneumonia at 23 mos. of age.
Stubb: Male, humane society rescue.  Died of probable heart failure at ~27 mos. of age.

Itzak (M) - 36 months (+ 1 week ish).  Giant tumour under hind leg, PTS.

Cracker Jac - petco feeder approx. 24 months, possibly sister to Little, after 12 months numerous tumors removed & constant respitory problems, cause of death euthanasia
Little - also petco feeder approx 26 months, possibly sister to Cracker, unknown cause for seizures, cause of death euthanasia
Noodle - rescue from Kim's 16 months, pituitary  tumor (pased July 3rd, 2005)

Squeekers---3 years (f)(died cause she broke her back, no idea how. Still a mystery. )
Whiskers----6 years (f) (Died cause she got sick.)
Princess----5 years (f) (died of old age)
Diana----4 1/2 years (f) (died of old age)

Currently owning a male which I've never had a male before. But anyway, he's 4 monthes old. 

Here are all the rats I remember:

Frank & Schmoozle, male & female curly respectively (Schmoozle did the oddest cyclic-balding thing...), bought from chain pet store, died at about 2 years 3 months due to acute respiratory distress.  Both were euthanized after I had a friend ratsit them and said friend "didn't like the smell" and bedded them on cedar.

Chi, blue hooded standard coat, bought from a chain pet store, died at about 18 months after accidentally breaking her own neck in an escape attempt (dove out of her cage, tried to climb an unsteady storage pile, and a box got her right behind her ears, poor girl)

Ozzy, dark brown agouti hooded, bought from a chain pet store, euthanized at about 3.75 years!  No scans were done but as his ears were quite clear the tilting of his head led to a diagnosis of probable brain tumor.  He was put down when he could no longer move the affected side of his body, but his temperament never suffered.

All the other rats I've kept were re-homed while in apparent good health due to upheavals in my own life leading to my long-time inability (thankfully corrected these days) to provide an animal with a stable home life.

Boo for Boo-ti-ful.  She was 1 month shy of  her third birthday.  She was the longest living rat I have ever had.  Cause: Long term lung issues, unverifyed Myco, an enlarged, abnormal heart.  PTS.