[V8] Fuel leak/valvetrain noise/oil type

[toml99 at todomundo.com]

I'll second Ron with the 20/50, but since I get up in high altitude  
in the winters, switch to 10/40 when I'm planning on being at  
elevation in the winter....Minnesota winters sounds like a 10/40 to  
me....I fill mine half way between high/low which I believe is around  
9.2 quarts.....Fill it all the way and it just goes out into the cats  
which is not good.  The Lago car came from Denver, and the dealer had  
5w/30 in it and we drove it across the rockies in mid summer with  
that, and it ran super hot.......I changed it in ID to 20/50, and it  
loved it and cooled way down.
The amended service bulletin I believe say's something like 9.1  
quarts......
Use Tony's hose method to determine where the sound is coming from,  
cause most people don't do the viscous fan clutch bearing/oil pump  
bearing in the timing belt procedure, and since I just did it, the  
Lago car is now quieter than the other 3 cars, and this sound would  
be coming from either the fan clutch, or lower.....Now that I know   
what the motor should sound like, I'm probably gonna have to do those  
bearings on the  5-speed since they weren't done and are probably  
original.   I always assumed that these cars just made that rattle  
sound while  idling.......Could have something to do with your  yet  
to be determined cam/belt is off a notch/sticky valve.   I'd try the  
ATF/Marvel/Kerosine(supposedly all that Marvel is/smells like it)/ 
JetA fuel(if you know a plane guy)Seafoam(supposedly just JetA)...... 
100% BioDiesel is even "slicker/more solventy" than all of these, and  
might even be a good alternatiive, but I'm not a  
petrochemist....Where's Karl when you