On Tue, 16 Dec 2003 11:09:10 -0500, Ron Porter wrote: >Some old SHOs seem to get the valve seal wear, which causes >smoke on startup, and others are over 200K without that issue. Lowrider has 263,000 miles and no smoke. It'll get to 300,000 whenever it gets back on the road, and it still won't smoke. Dyno juice 10/40 (with STP lately) all the way. George