Is that tongue in cheek humor, Taxi Girl? After camshafts, timing chains, valve lifters and rocker arms, all that is left are the nuts and bolts. Does MMO also cure baldness?
AMEN to that! Trying to mask a problem doesn't correct it and that same lubricant also affects the other mechanicals in the motor.You should use nothing other than the recommended viscosity of oil.
Too thick will cause as much problem as too thin. Thick oil won't flow as fast when cold and may not protect the tighter tolerances on a modern engine as well as the recommended thinner oil.
The same as me saying that the noise went away as my 70 year old ears lost their hearing. The problem was not corrected. Tapping? What tapping?In fact the noise did go away completely for 6 months.