2010 VOLVO W/ISX450

[volvo126]

Hey guys. Haven't been here in a while, so I thought I would check in. It's been a few years since I did a complete Rawze type EGR TUNE UP on this engine. I spared no expense, REPLACING, (not just cleaning), all sensors related to the emission system. Replaced DPF, EGR valve, and 7th injector. Removed all piping related to emission system and cleaned. Since then I have not had ONE SINGLE check engine light come on. For my operation, fuel mileage is great. I add a gallon of oil around 8000 miles, and change it between 10-11 thousand miles. At 768,000 miles, is there anything I should be doing to be proactive? I hear people talk about running the overhead once a year, but this motor seems to be doing just fine. Motor is completely stock.