Ok, so why don't you say what you really mean excel. :-)

I looked some more and I stand corrected.

Here is a (non-marketing) article telling why NOT to use an oil of a higher viscosity than the manufacturer recommends. It affirms the common widsom of this group, that a higher viscosity is likely to damage engines designed for lower viscosity oils.

http://www.gatewaycleanair.com/mecha...7_2/story1.htm

(They are part of the Missouri Department of Natural Resources).

So the short answer is use what the manufacturer recommends, 0w20 (or 5w20 in a pinch) in the HCH case. Anything else is likely to damage your engine.

thanks,
- Kurt