[Gilbo_3]

Ditto to #2 & #3. I would also recommend that you stay current on the maintenance as you say you have. keeping the fluids & filters {ALL OF THEM!!! } clean is the best bet for longevity ive seen. Use the Lowest recommended octane that doesn't cause pinging and throw in a bottle of techron on occasion for extra shot of injector cleaning. Hope it helps ease your mind...

[Gilbo_3]

Also, if you use full service stations, you might politely ask the manager if you could be given service at the self serve pumps instead, Ive always been more than happy to oblige someone who wouldnt mind pumping it themselves except for a disability, the price per gallon for you is huge in that van...

[Centurion2000]

I would also recommend that you stay current on the maintenance as you say you have. keeping the fluids & filters {ALL OF THEM!!! }

What exactly do you mean all of them ?? Oil and air filters get changed and then the fuel filter and fluids are easy to keep up with .... are you talking about greasing the chassis and the differential fliuds for the rear axle ?