Who runs without a filter?

[Dave]

As Dan said, i've done well over 10k on one engine, and upton head removal the bores were perfect. The main issue to me, due to it costing the most to me, was the blades on the turbo, you could see foreign bodies had hit them at some point.



Over time particles in air will just create a fine grit in your engine though. Although I would have more than likely changed engine before then.