Oil + additive viscosity

67 gt said

Billbo I don't know if your engine is a new build as I wouldn't recommend putting synthetic in unless you have some miles on it. have you tried the Penrite 15-50 ten tenths full syn ?. I use this in mine as I use the 10-30 as well solid flat tappet.
https://penriteoil.com.au/assets/pis_pdfs/10 TENTHS RACING 15W-50 (100percent PAO & ESTER).pdf

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Which oil do you use? The 15w50 or the 10w30. Also what kind of oil pressure do you get with each oil? I want to use a thinner oil but I am a bit concerned about dropping too low in pressure especially when you are cruising at about 3000 rpm and the pressure drops to about 48 - 50 psi. Also the noisier ( only sightly noisier) valve train I dont mind it if it doesnt cause problems. Have you or anyone noticed this with different viscocity oils?