Penz yellow bottle 10W-40: Feel the quiet

[gedcruise]

I put PZ yellow bottle 10W-40 in my '97 Accord a couple of weeks ago, and was astounded by how much less mechanical noise I heard compared to the PP 5W-30 that was in it.
I have a small stash of the 10W-40 left over from a now destroyed Mercedes, and I need to use it for something.
Honda allows a 10W-30 down to 20 degrees F, so I figured that a 1040 would be okay for a short run, through the end of November, where we will not likely see such low temps.
The bonus was in the incredibly quiet and smooth operation of the engine. I always thought that our old Civics were smoother than our later Accords. I wonder whether that's because the Civs got 10W-40, which Honda speced at the time, while we have always used either 10W-30 or 5W-30 in the Accords?

 

[Auto-Union]

I have it in my old I-5 Audi. Runs smooth.

 

[Boomer01]

Yep, I dropped the PP 5W20 in my '07 CRV and put 5W20 yellow bottle in and the valve train was a tad quieter.

 

[Merkava_4]

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I put PZ yellow bottle 10W-40 in my '97 Accord a couple of weeks ago, and was astounded by how much less mechanical noise I heard compared to the PP 5W-30 that was in it.

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I don't doubt that one bit; thicker oils always make an engine smoother and quieter.

 

[Triple_Se7en]

Thicker oils increase/play into the engine sound deadner syndrome.

I think the same applies with many synthetics versus dinos in the same viscosity range.

Just give a couple minutes warmup time on the coldest winter days of Monroe Ohio.

 

[Camu Mahubah]

A couple years ago, FIL was running Mobil Drive Clean 10w40 is his Chrysler minimum vans. Once when I changed the oil I snuck some Pennzoil 10w40 in there. (It was on sale!) MIL commented on how much quieter her van was since I worked on it. It sounded less noisy to me too. I think back then Pennzoil had a much better additive package(still does) but I can't be sure. The 472 seems to like at, as I have yellow-bottle 10w40 in the sump. Really wanted to run AMO but since I am selling her I just raided Grandpa's shed for yellow-bottle.

 

[Merkava_4]

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Thicker oils increase/play into the engine sound deadner syndrome.

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I always thought the thicker oil filling in the clearances between parts is what contributes to the quietness; you're making it seem like all it's doing is deadening the sound like the sound proof foam walls at the hearing test room in the doctor's office.

 

[lovcom]

So does quieter smoother engine operation mean less wear?

 

[foxer]

I have been running 5/30 Chevron Supreme in my V8 Tundra. Took it to a nearby dealer who uses Pennzoil. I could tell the difference, although slight. It was quieter

 

[gedcruise]

Triple,
Before the really cold weather comes, usually not before the first of the year, she will be back on PP 5W-30.
Are you saying that syns are usually thiner than dinos of a given viscosity range? PP does seem thin when you pour it in, as does M1. The GC I have in the other Accord, OTOH, seems fairly thick, which it is. It also has good sound attenuating qualities.
I might add that BB (before BITOG), I never really noticed that oil can actually make a difference in the mechanical noise one hears.

 

[Merkava_4]

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So does quieter smoother engine operation mean less wear?

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I think it does, but not all engines need a thicker oil. It's one of those application dependant type things.

 

[Merkava_4]

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Are you saying that syns are usually thiner than dinos of a given viscosity range?

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Triple_Se7en will have his own answer, but I think some synthetic oils act like a thinner oil than they are; that's comparing them to their conventional counterparts.

 

[ToyotaNSaturn]

gedcruise, did you use SL or SM 10w-40 Pennzoil?