I bought a 1999 4x4 auto with about 104,000 miles a couple years ago which idled fine, but when under any load would smoke alot .... no modifications. I did not know any better and thought it had O.K. power until I rode in someone else's 24v. Well I looked for everything that would cause smoke. Ended up being a bad injector, replaced with RV 275's and now have good power.My question is, would me running the truck for about 15,000 miles, and I don't know how long before I bought it with bad injectors, cause issues with longevity of the motor. The truck now has 170,000 and runs fine and does not blow oil.Also the short block only had about 40,000 miles when I bought it.Sorry for the hypothetical question.Thanks