I think of cummins as a real engine manufacturer, Perkins ok but stink, less efficient. Volvo builds lots of diesels international, maby not as popular here but stupid expensive here. Came into lots of Deutz oil cooled work last 10 years, not bad but cam timing belt? Perkins parts stupid, head bolts 3 weeks away and they break them. Cummins in my skid steer, one reason I bought it, beautiful engine! My wife got me a free MCI 7 bus a while back, 8v71, I have done a lot of work on detroits, your not going to find one in a 25' but all I can say reliable as crap and I got tired of that project a year later and sold it. Smelly pos!