[blykins]

Pressure fed lifters have been around for probably 8-10 years now. I wouldn't run a solid roller without them.

I think Comp rated their non-oiling lifters to have a life of around 3500 miles. They extended the rating of their oiled lifters to 7500-10000 miles.

There are a lot of factors that go into how long a lifter will live....spring pressure, cam lobe aggressiveness, valve lash, etc.

Solid rollers are fun and they're my preferred cam for a fun street car....but you have to play your cards right with them.