Or rougher?
So many people on this board now offer anecdotal comments that a particular oil brand or viscosity grade makes their engine "smoother" or "rougher" or "more quiet" or "noisier." I'd very much like to know the science behind these comments.
I admit to being a doubter, especially on the rough or smooth aspects (I can see where viscosity might make a difference with noise) but I'm willing to be convinced if someone can come up with convincing information.
Conversely, if someone has info counter to that, let's hear it.
I sincerely hope this doesn't degrade into an utterly useless, bandwidth-wasting, feelings-hurting urination contest.
For myself, I honestly cannot think of how one oil or another can make an engine smoother or rougher.
So many people on this board now offer anecdotal comments that a particular oil brand or viscosity grade makes their engine "smoother" or "rougher" or "more quiet" or "noisier." I'd very much like to know the science behind these comments.
I admit to being a doubter, especially on the rough or smooth aspects (I can see where viscosity might make a difference with noise) but I'm willing to be convinced if someone can come up with convincing information.
Conversely, if someone has info counter to that, let's hear it.
I sincerely hope this doesn't degrade into an utterly useless, bandwidth-wasting, feelings-hurting urination contest.
For myself, I honestly cannot think of how one oil or another can make an engine smoother or rougher.