Considering a 24-25 Suburban. Which engine is most reliable?

[Offthesheet]

For best reliability and least odds of having a problem which engine do you all recommend most?

 

[PPK_]

I will say… the 5.3 has been around a while.. my guess is that clean-up of the blocks is now poor.. and the tooling to do the block/heads has seen better days. First figure is the 5.3 filter and what magnetic contents there are.. figure two is the first drain of my ‘24 yukon.. right block is the first drain of a ‘25 slt with a 3.0. I think the newer engine and new tooling shows a lot less issues than our older V8s.

If you really look at the middle drain oil.. there is a lot of aluminum and some iron too in the oil. Not good

I think… you do a drain at 25 hrs. I did another drain at 50 hrs it was a lot cleaner.. you have to have clean oil for an engine to last.. i think carbyte is the afm eliminator or just run in 9 gear.

And finally if had to do the yukon purchase again with 5.3 in it.. would do a 3.0.. bummer…

 

[viven44]

Of the gas ones, 5.3 is the better choice from a reliability standpoint currently. The 6.2 engine is under investigation, as part of a fairly large NHTSA probe.