I don't know how scientific this is but check this out. I have a decibel meter app on my phone. I got home, parked my LS400 in the driveway, left it idling and placed my phone directly on top of the intake. The meter bounced between 53-55 at idle.
I changed oil to a different brand and drove my LS400 about 6 miles and got it warmed up. Parked in the driveway and following the same procedure I got a reading of between 50-52 decibels.
This wasn't some emotionally guided response trying to prove one oil is better or quieter than another. Same phone, same location, same car, etc.
Looks to me that a quieter idling engine is better. Am I wrong? Seems to me the quieter oil would be better for my engine. Oh, same viscosity in that they are both 5w30's.
I changed oil to a different brand and drove my LS400 about 6 miles and got it warmed up. Parked in the driveway and following the same procedure I got a reading of between 50-52 decibels.
This wasn't some emotionally guided response trying to prove one oil is better or quieter than another. Same phone, same location, same car, etc.
Looks to me that a quieter idling engine is better. Am I wrong? Seems to me the quieter oil would be better for my engine. Oh, same viscosity in that they are both 5w30's.