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https://oil-glup.ru/threads/rock-n-brick-twist-blend-and-stirred.120/page-24#post-41809
A lubricant test report compares Amsoil SS 5W-30 SP and Amsoil SS 0W-40 SP alongside their equal blend. The table lists physical and chemical properties such as HTHS, kinematic viscosities at 40°C and 100°C, viscosity index, TBN, pour point, flash point, CCS, NOAK volatility, and elemental concentrations. To be honest, blending these oils creates a custom viscosity grade that splits the difference in cold cranking simulator and volatility results.