My parents bought the first Plymouth minivan back in '86(?) with the dinky 2.5ish L engine. Towing a trailer it would just hit 65...then upshift and slow down to 60.
I got their '92 in '96 and had 132,000 miles on it in 2003 when they offered me the relatively new 2000 Chrysler T&C LXi. I was hesitant at first because with the '92 I'd already replace or fixed the muffler, AC evaps front and rear, water pump, and the rack blew it's seals at 130,000 miles.
But I'm happy I did take the LXi because so far, apart from the crappy OEM AC Evaps, has been a solid car. Water pump didn't fail until 112,000 miles; radiator last year in May on a trip to Colorado it sprang a leak...fixed with Barz and replaced in Houston that June, and it was absolutely flawless this year for the annual trip to Estes Park from Houston. Cruised solidly at 75-85 mph all the way.
As of 133,000 miles and 16.5 yrs of service:
Replaced the plugs myself.
Replaced the radiator, also myself...lot's of fun in 97 degree heat.
Double sided gates v-belt for the belt throwing, then put on the new bracket per the TSB and found it did NOT help at all.
Struts and shocks with the rears getting the Monroe load leveler coil overs. Very nice with a full load for the highway.
Put on powerstop discs and pads last year, made a difference.
Retrofit LEDs into all the interior lights.
12" ported subwoofer with 1000w amp to provide the missing bottom octave for the infinity sound system which lost some low end between the '92 and the '96 redesign.
Replaced the rear-most hatch pillar tweeters because the foam surround was shot.
Retrofit the old 5 band graphic eq + cassette head unit in place of the mostly useless 3 band + CD head unit from 2000 because I like the 5 band over the 3.
Oh! Built a 6 band subwoofer graphic EQ for the van and put the knobs on the fascia trim panel below the head unit. 25, 31, 40, 50, 60, 85 hz.
Needs to have the headliner replaced...but apart from that, the van, at current usage, should be good another 17-25 yrs.