I still miss em all. I can name every pet I had growing up and distinctly list personality traits of each as if describing an animal sitting next to me. My first dog, Joey, who I got when I was ONE and was forced to put down when I was 21, I can still remember what the top of his head between his ears smelled like, what his bark was like in his younger days, his gate when the dysplasia got bad, every night taking him outside with a home made sling supporting his hind quarters in his later years and again, the smell on the top of his head between his hears when he was being put down. He was, for all intents and purposes, my brother. It took 15 years for me to get another dog. Now I have three and one cat. All you can do is cherish the days and keep the memories close to your heart when their time comes.
Thanks for posting here, man. I hope that you get some time to reflect on the beauty of your time with Diesel... Remember too, that released from the shackles of his earthly vehicle, he is now free to roam all of creation and be all around you.
