Valvoline R&P Oil Burner Test Results

it seems VRP clean piston rings well. It's very helpful for low tension piston rings engine in Toyota and Honda that often burn oil after 100k miles.
It won't help if the cylinder wall already scuffed like many 2.5 and 1.8 L hybrid Toyota engines.

Kindly elaborate.

You’re saying those particular engines end up with scuffed cylinder walls through normal use? Because of the low tension piston rings?

Or, perhaps they come “pre-scuffed” from the factory? 😎
 
Why not keep running R&P since it's doing so well? It may still improve. Also you were running excellent oils and the rings still got carboned up as has happened with a number of people on here.
She is doing it for science! To see if a Euro spec’d oil can stave off the oil consumption issue.
 
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