1999-06 ls engine question?

[CHEVROLADE]

Yup uncle had 300 k miles on his 5.3 and only thing failed was rocker bearings

[mopower440]

This is why i asked this: I have a 1999 extended cab 4x4 with the 4.8, it has 211,000 miles on it and runs just fine and uses absolutely no oil and oil stays clean betweem changes. I just got back from a long trip with it, 1150 miles each way and she did awesome. I plan on doing this trip probably every year and wondering at what mileage should i start getting concerned with the engine failing on me as i dont want to get stuck on the side of the road somewhere on these long trips..Figured at some point i need to swap in a lower mileage engine to be safe, but when? what mileage should i start considering swapping in a lower mileage engine?

[Botlfed]

To be honest man, with good upkeep, change the rockers, lifters and pushrods, get some injector cleaner, or just clean em by hand, i dont see any reason to change the motor on a non aggressive driven truck. probably around 250-275k or maybe even now if you have the money take care of the above mentioned stuff and keep driving it man. Also beware of the transmision shift solenoids, 25$ part could make you think youre losing your trans. the 4.8 in my crew cab isnt coming out til it falls out on the highway.