LSJr. The TRUTH About Valvoline's BOLD Engine Cleaning Claims

[Glenda W.]

Will clean varnish too:

"thank you for contacting Valvoline Product Support,

Yes, Restore & Protect is designed to clean and remove both deposits and varnish."

Thanks! Impressive

 

[OVERKILL]

Will clean varnish too:

"thank you for contacting Valvoline Product Support,

Yes, Restore & Protect is designed to clean and remove both deposits and varnish."

I mean, objectively, that makes total sense. What causes ring sticking is basically varnish/lacquer that builds up in the lands combined with coke that plugs up the oil control rings and their drains. So if they've got a mechanism that works on that combination, it's going to work on the same compound elsewhere in the engine.

 

[Elkins45]

Both of my current xB’s with the infamous 2AZ-FE have demonstrated oil consumption issues and the 2012 with only 80k miles (almost all at low speed) seemingly had varnish related compression issues in at least one cylinder. When I replaced the leaky valve cover gasket on it the varnish on the cams looked like a car with 200k. Both have gotten Berryman’s piston soaks and both are now running 0w-20 R&P.

I’ll be interested to see whether I’ll need to repeat the piston soaks in another 20k or if the oil will keep them clear.