Originally Posted By: dave1251
Originally Posted By: 2010_FX4
Originally Posted By: Merkava_4
Originally Posted By: JAM25
Idk why I want to use 10W-30 but I want feedback.
Have you ever done the bottle shake test in the store? 5W-20 feels like water.
Is this a new scientific test for oil viscosity? What does 5W-30 feel like when shaken? Thicker water? How about 0W-20; does it feel like thinner water?
He can not tell the difference if there was not label. If I changed his oil last night to 0W20 he would not know vs 5W30.
But he craves attention.
It's doubtful an unsuspecting driver would be able to detect a difference if you swapped the oil out but that's irrelevant. You can't "feel" the engine wearing as you drive down the road yet we know some oils produce less wear than others.
If you're talking about the bottle test, there was always a noticeable difference when pouring the oil in the engine when I used to mix viscosities (of the same brand). I might not be able to name off what weight I'm pouring in by sight but I can sure has heck see the difference in a 5w-20 vs a 5w-30 vs a 5w-40 when pouring it in.
I don't see what the big deal is. The starting and hot viscosity is going to be similar between a 20wt in winter and a 40wt in a hot summer. Same goes for expected usage. Some might run 170 degree oil temps and some might run 250 degree temps. There seems to be a huge push it seems for the one size fits all oil. Why would a 20wt be ok for 170 degree oil temps but a 40wt is considered too thick even for trucks that might push oil temps into the 250 degree range? Guess which one is thinner, the 20wt at 170F or the 40w at 250F.