I can’t see why she won’t last you 3 years, Dave.
My girl is running better now too. I changed the fuel filter as well, but didn’t fill it with cleaner, as I didn’t know that was a thing until recently. She seems to be running pretty good, however, after the extensive service, Shell V-Power diesel, and many bottles of additives I’ve given her.
You might want to clean or replace the MAP sensor — easy job and really helps. Can do the MAF as well, but I didn’t noticed much difference after cleaning mine.
Keep us up to speed on her progress, Dave. I’m sure there are lots of knowledgeable folk on here who can help you if you run into problems.
Take care
Marty