Why do you have cats on it? It won't take long for zinc to kill the converter. That's why it was eliminated. No matter how well the rings seal, there is oil migration past the rings. The zinc gets on the catalyst and kills it quick.
Hi yellow rose, I'm running cats due to health issues involving my respiratory system. Because of the cats this is the reason I'm asking what is the minimum ppm of zinc that is required for adequate protection for a high lift cam yet won't kill the converters anytime soon. Example: Valvoline VR1 has 1400ppm is that enough for a high lift cam or do you need an oil with a higher amount of zinc. Oil has ppm levels of zinc that range from low 600 ppm to 6500 ppm and higher. Just need an oil that will keep my cam and converters living in harmony together.
