You can’t really tell. It’s an EDUCATED guess. Even the BEST made vehicle won’t hold up to a bad maintenance schedule.
Based on my past experience and family and friends…GM and Ford have had dismal life spans. I maintained my GMC S-15 religiously for the 7 years I owned it. But no matter what I did it started to fall apart at 150k miles. Did the same maintenance to my 90 and 98 Pathfinder and both saw over 300k miles and were running great when I no longer drove them. Daughter is going to graduate this year and hopefully the 98 will last that long. Running great now at 330k miles.