I have gone about 2 years since my last re-build. Re-build time will be effected by a lot of things like dirty airfilters, shitty gas, shitty oil. Sometimes you may just get some shitty parts in there and they need to be replaced faster than others. So I really dont think a person could put a time or any kind of a distance or amount of fuel burned to measure when you need to re-build with out doing a compression check. Thats just my $0.02.