 I'm a manufacturer rep of engine management and fuel delivery systems for NAPA Auto Parts.I easily travel 40,000 miles annually and drive a 2010 Sienna.It currently has 115,000 miles on it and it's one of the most bullet proof vehicles I've ever had.At well over 100,000 miles I've kept up on the maintenance which has been almost nothing and it's still going strong.To date the only maintenance the van has required has been oil changes, a few sets of tires, and a couple of brake jobs.I've also flushed the power steering and transmission.It just doesn't really need a lot of maintenance and continues to run strong.The spark plugs are original and still look amazing. 