Originally Posted By: Oscar_Ruitt
A Toyota 4 cylinder will last for a long, long time. I wouldn't worry about longevity. If you can live with the accelleration, go for the 4 cylinder. If I had to pick an engine to trust to, say, run a hospital in which people would die if it quit running, it would be a Toyota 4 cylinder. In fact, when they first came out with a V6 in the 1990s, it was much more prone to failure than their 4 cylinder, though I'm sure the V6 is great by now too.
Interesting you say that. Most hospitals use either a Detroit Diesel, CAT, or Cummins diesel for theirs. The one I used to work at had a 24V92 (apparently fairly rare) and a 16V71 for backup generators. I only got to hear them running once, but I went outside and it was an impressive noise for sure.
Uh, on topic, I don't think the OP needs to worry. The 4 cylinder will last just as long as the 6 cylinder, at least as far as accounting for "strain" goes. If you are happy with the acceleration it has, go for it without worry.