My oldest Benji is 10 1/2 years old, I've had him from 8 weeks old. He has only ever had one health problem which was a small abcess when he was about 1; he has been as fit as a fiddle ever since and still is now!
He started off on Excell all those years ago, then went onto Science Selective! Then he was on Allen & Page Natural Pellets for a little while, and for the last about 4 years he has been on either Spillers High Protein Pellets or Allen & Page breeder/grower. He has always had vegetables once a day and lots of hay!
I love my little Benji and hope he lives another long time with me.
I haven't got a recent picture (which reminded me of taking some!), but here's a couple when he was younger
Then I have Charlie, who is 8 1/2 years old, she is a rescue I've had for 7 years. She has never had any health problems either other than one dental last year, but she now has a neurological problem and is on steroids (but so far doing well on them). She had the same diet as Benji above.
A recent picture of my little girl