I've had several old trucks that I've restored including an F Model Mack w sleeper. That one was my last diesel. 12 gallon (yes gallon) oil changes, 3 oil filters, two fuel filters and on and on. Given the truck had the extended service package, but I'd never run the thing long or hard enough to get to the next service interval for several years. Here comes the condensation and sludge avoidance oil changes at over $200 a pop. I was at our show in Macungie this past weekend talking with several hobbyist restorers of the smaller trucks. With the price differential of diesel vs gas, and the occasional hobbyist type use most of us give our vehicles, the gas engine is still to me more cost effective. Not knocking diesel, but if I'm not going to take a vehicle out to work it, or put some serious miles on it, I'm gonna stick with gas jobs. Just my personal preference. Mike