I'll back you upon this conclusion. When I was running Silkolene RacelubeSilkolene "Racelube" IS a semi-synthetic, "synthetic reinforced" according to the manufacturer, (SS-DF)
20-50 mineral, my oil light seldom came on. I just changed to Bel Ray EXP
20-50 semi synthetic and my oil light comes on during hard launches.
Ciao
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