MaxLife 5w30 SM is "Oil of the Year" in my 99 Camry 4 banger. The only oil today I will put in this sludge prone engine. WIX or NAPA GOLD filters.
In the last year, it has cleaned the engine to my satisfaction.
Yes, it removed carbon - - - - - - from the PCV and intake area.
We got 34.6mpg on the 1100 mile trip from Det to Destin FLA!! (that’s better than specs) 1500 miles on it and it is still looks like new!
Of course, the rest of the car is tuned to the "T", new struts, mounts, and link arms, new tires, air filter, timing belt, plugs & wires, TB cleaning, tyranny fluid drain & fill x7, diff fluid change, 4 wheel align, PS fluid drain & fill x5, Coolant flush, brake fluid flush, you know, the stuff we BITOG guys get OCD about.
Bottom line, Maxlife has removed the carbon - - - - - - from the PCV and intake, stopped the "puff of blue smoke" at startup, and makes this engine run quiet and smooth......