Crazy engine question

I was surfing used dealer Tundra ads local and noticed a 2018 Platinum that caught my eye because the price said 35K. I click the ad fast and turns out that this 2018 had 45,000 miles and was 2wd. This got me to thinking is there any difference on over all engine life on how fast or slow miles are added as long as required maintenance is done at same miles. Is a 2018 with 45,000 miles any worse than a 2014 with 45,000 miles?

 

Probably better if anything, that's likely a lot of freeway miles. Longer drives are better on the motor than lots of short drives.

 

Ed Zachery! Idling, and short trips of stop and go driving with many heat cycles are far harder on an engine then continuous long trips. This is the reason you’ll see used vehicles advertised with “highway miles”. Conditions in which the million mile Tundra was driven, from my understanding.

 

What about the same highway miles just not that often? Any better / worse? My 2016 has 23,000 most high way, because of work van.

 

Better then short grocery runs.

 

Just questions, why would idle at low RPM be worse than highway speed at much higher RPM? I know in elec motors and parts the higher the RPM and load on motor the faster bearing wear.

 

Highway speeds doesn't necessarily mean higher rpm than street driving. While idling on it's own isn't too bad for a motor, it is a run time with low oil pressure.

It's more to do with the fatigue on the motor from being put through lots of starts, stops, accelerations and all that goes with street driving. If you've ever pushed a car, imagine if you had to push it a short distance and stop it, them push another short distance and stop it, and continue this pattern for say 50 yards. Then think of how much easier it would be to cross 50 years if you could just get the car moving and continue the momentum.

Unless the owner of that car worked crazy hours as a pizza delivery, it's likely a lot of highway miles from a long work commute. That's roughly 3x average annual mileage where I live.

 

10-4 I understand that, makes since. I was wondering about idle because he said idle and stop and go was worse than high way speed. Do you think any difference in a 1 year and 4 year old truck with same miles and type of miles and same maintenance.

 

A 1 year old truck is better than 4. Less sun exposure means plastic parts have less fatigue. The door has probably been open and closed fewer times. Metal has has 3 less years to corrode.

Also, if they are lots of highway miles, the engine has probably had less starts and warm ups than a 4 year old truck.

I would only want to see the service records. If someone knew they were putting tons of miles on it for work, and likely being reimbursed, maybe they didn’t care about maintenance

 

good point. I passed on it because the Top of the line truck with 2wd, also wife would stroke out.

 

As a 2wd owner myself, agreed

 

Not the case here, but sitting unused for long periods of time is also hard on vehicles. The rubber components (hoses and seals) seem to be most effected by non-use. You could argue that roller bearings, gears and engine internals are more prone to rusting when they sit motionless and un-oiled for a long time.

There also seems to be more electrical issues when putting a vehicle back in service after a long dormancy as well, but sometimes that's because of rats and mice chewing on wires.