Hi I was wondering what oil you guys recommend for a high comp gsr, if specs help im running 12.5 to 1 compression with toda type c cams dynoed at 215hp and 146tq been running eneos 5w30 but recently the valve noise has been getting to me. Should go with a slightly thicker oil like mobil1 10-40 or royal purple 15w40? Also was wondering about the the edelbrock zinc additive?