my theory in hybrid 0w-20 is it contains thicker end 20 oil to reduce the effect of oil dilution and higher TBN to deal with sludge formation.
Cold engine cause sludge formation, hot engine cause varnish oxidation.
However, i found Toyota engine oil consumption is often caused by caked piston rings from extended oil change interval. So, 5k OCI cheaper synthetic oil is better than boutique 10k.
Cold engine cause sludge formation, hot engine cause varnish oxidation.
However, i found Toyota engine oil consumption is often caused by caked piston rings from extended oil change interval. So, 5k OCI cheaper synthetic oil is better than boutique 10k.