Money vs Horsepower

Thought on the HYD Subject. Does oil weight play a big roll on how stable the valve will be at Higher RPM's?? I would think thicker oil say Straight 30 or 40 weight or maybe 20/50 would help when choosing to use a Hydraulic wether flat tappet or Roller. Seems you would still loose some lift/stabilization from the plunger but it would be less with the thicker oil. Maybe pump up issues would be less for the guys that are worried about it?

Example of what happened to me.....

I missed a shift in my 70 340 4spd into 2nd gear with a Hyd Flat Tappet, the top end was fresh, New 484 Purple Cam, New Springs, Fresh Valve Job, Head Gaskets etc. The engine revved to about 7200RPM or so, the Valves Floated. It dropped a Valve, took out a cylinder wall, broke 2 pistions put a hole in the block and twisted up a Rod to where you could not tell what it was.
Yeah I know I should have had a REV Limiter but I didn't. This is why I don't like HYD set ups.