Here > AMSOIL - AMS-Oiler Pre Charger - pre oiler ends dry engine starts
The Amsoil one never worked worth squat is one reason they quit selling it IMO. There's info on TDR about it...if you're interested enough I can look it up if you aren't a member there. Basically, there's not enough oil volume injected to even bump the needle on a mechanical oil pressure gauge...much less bring the engine up to oil pressure.
The biggest need that I can see for a pre-lube system is the rocker/trunnions on CRs. Mine on my '06 were pretty scarred up at 43k miles, and definitly imposing some significant friction. Mike at Lazarsmith and others have seen the same thing pretty frequently.
A local guy just installed a Jasper 5.9 reman (per customer's request). The rocker/trunnions were scored so badly that one of the valves opened, and never closed. He called Jasper and said he needed them to send him a new set of rockers because the ones on the reman engine were so bad. Silence on the other end. Jasper guy finally said, uhhh, that won't do any good...all our rockers are scored like that!
I designed a system a couple years ago that's bullet proof and uses only top notch components. I thought about putting a couple kits together to sell, but at the price I'd have to ask to come out even, the market would be non-existant. At any rate, when the key is turned to the "on" position, an electric oil pump runs for 30 seconds and then shuts off (this time is adjustable via a built in pot). If you start the engine before the 30 seconds is up, there's no problem. After you shut the engine down, the pump again kicks on and post-lubes for 1 min (again, this time is completely tuneable to what you want) to keep sending oil through the engine, turbo, etc.
--Eric