Royal purple oil, who uses it? Options

[toon1]

I was just reading a thread where Jake stated he liked royal purple oil. Has anyone been using it?

What is everyones preferances?

[Dave_Darling]

QUOTE (toon1 @ Feb 3 2006, 06:50 AM)

I havn't gone on the sites to check it out but it sounds like I can't just remove the CH gasket without the correct base shim. But the compression can be raised effectivly with the correct base shim?

The base shim is only to restore the compression ratio to stock. If you want a higher compression ratio, you can omit installing the shim. Just make sure your deck height doesn't get too small when you do this (you want about 0.040" I believe), and that your compression winds up in the range that you want.

I am told (but have not verified) that removing the stock head gasket results in "about" a 0.5 point increase in the compression ratio. But it depends on a whole lot of factors, and small changes in some of those factors can have unexpectedly large effects on the compression ratio, so you really want to measure and calculate the actual ratio you are getting.

--DD