What are the chances that daily driving for over a year with a really stiff valvespring like the JG Pro Series inners/ outers combo, would wear down the lobes of some large lobe cams like JUN III's?
I've read about in troubleshooting guides and know its possible but don't hear about it too often. Just wondering if a valvetrain like the above will eventually cause damage on a DD setup?

 

ttt

 

https://honda-tech.com/zerothread?id=1573792

 

I'm not sure I am getting your point. The link you gave me discussed dino vs. synth oils and oil additive packages rather than big cams/ high valvespring rates?

 

The point is use the advice on the thread and you should not have a problem. Dan

 

Thanks for the advice. Sounds like you know your stuff on motor oils. I'm just trying to educate myself a bit and build smart.

Any idea how Royal Purple 10w-40 compares? (BTW, F*ck the haters, I've used it in my turbo car 6 years ago and had good luck with it ever since.)

 

Is Royal Purple SL or SM api rated? If SM I would add 4oz. of GM EOS to it with an oil change. Dan