[Rowdyone]

Higher RPMs equals shorter life span.

[TexasGator]

“Higher RPMs equals shorter life span.”

Not if the engine is built for the rpms.

[Omnivore-Dan]

Not always. With CNC, balanced crank, decent bearings, good oiling system, there are engines that can rev 10k all day long, but they will most likely bust the budget of most people.

[Texaspeptoman]

I don’t know but my ‘09 Civic SI redlines at 8K. I’m at 200k and going strong. I do a regular oil change w/ Amsoil. I love it.

[SPDSHDW]

More HP equals shorter lifespan. This is why the big diesel engines come in various HP packages. The million mile rig engines have less hp then others. Also one of the reasons the cummins isb in a cab chassis ram averages 150k more miles before a rebuild vs the pickup engine

[Svartalfiar]

Higher RPMs equals shorter life span.

The GE90 hits 10,000+ rpm and lasts 15-20,000 hours until it's first big overhaul. Some of them have hit 100,000 hours. How long does your piddly 500 rpm (and that's hot on it) go kart last?