What makes oil quiet?
- Thread starter Swift101
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Polarity + retention, EP ADDS (ZDDP, MoDt), traction, operating viscosity.
Great question. I don't know, but I have tested an awful lot and the quietest oils in actual use for me had little to nothing in common add pack wise.
The quietest oil in my Jeep is PYB, I "think" it's the moly but I also ran the old Valvoline Maxlife in it that had all the moly as well and it clattered so bad I had to drain it early I couldn't take it anymore.
It gets even cloudier as an oil that might be clangy in the Jeep will be silent in the Chevy, go figure.
The quietest oil in my Jeep is PYB, I "think" it's the moly but I also ran the old Valvoline Maxlife in it that had all the moly as well and it clattered so bad I had to drain it early I couldn't take it anymore.
It gets even cloudier as an oil that might be clangy in the Jeep will be silent in the Chevy, go figure.
Yeah, I found Mobil 1 to be very loud in a Chrysler 3.8L engine, and Pennzoil Platinum was super quiet. In our Hondas, it's somewhat reversed...Mobil 1 is very quiet while the Pennzoil synthetics (PP and PU) are somewhat louder. Pennzoil conventional is very quiet in both of our vehicles, and it's what I have in both right now.
German Castrol has an additive called SPT that acts as a shock absorber between colliding parts.
I assume it's more complex and effective than a simple thickening agent.
Maybe an expert can step in and explain it.
I assume it's more complex and effective than a simple thickening agent.
Maybe an expert can step in and explain it.
OVERKILL
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Originally Posted By: turtlevette
German Castrol has an additive called SPT that acts as a shock absorber between colliding parts.
I assume it's more complex and effective than a simple thickening agent.
Maybe an expert can step in and explain it.
SPT is just an acronym for "Syntec Power Technology". No different than Mobil's branding in the past of "SuperSyn" or "Tri-Syn".
German Castrol has an additive called SPT that acts as a shock absorber between colliding parts.
I assume it's more complex and effective than a simple thickening agent.
Maybe an expert can step in and explain it.
SPT is just an acronym for "Syntec Power Technology". No different than Mobil's branding in the past of "SuperSyn" or "Tri-Syn".
Originally Posted By: OVERKILL
SPT is just an acronym for "Syntec Power Technology".
I guess I got the wrong acronym but I remember reading somewhere that there is an additive in it that reduces shock loading.
SPT is just an acronym for "Syntec Power Technology".
I guess I got the wrong acronym but I remember reading somewhere that there is an additive in it that reduces shock loading.
OVERKILL
$100 Site Donor 2021
Originally Posted By: turtlevette
Originally Posted By: OVERKILL
SPT is just an acronym for "Syntec Power Technology".
I guess I got the wrong acronym but I remember reading somewhere that there is an additive in it that reduces shock loading.
It was probably a Castrol marketing piece
I'm sure Molakule or Tom NJ could speak more to what Castrol's making a vague reference to, but I doubt it is anything unique to BP's product line.
Originally Posted By: OVERKILL
SPT is just an acronym for "Syntec Power Technology".
I guess I got the wrong acronym but I remember reading somewhere that there is an additive in it that reduces shock loading.
It was probably a Castrol marketing piece
Originally Posted By: Swift101
Does anyone know what properties make one oil quieter than another?
The amount of wax in the driver's ears.
Does anyone know what properties make one oil quieter than another?
The amount of wax in the driver's ears.
I've always found a thicker oil to be a quieter oil.
New oil always seems smoother and quieter than the oil just drained, even if the new oil is exactly the same as the old oil.
Some think that moly, boron and titanium adds contribute to smoother running, but I've had oils with none of the above seem mighty smooth.
There are also friction modifiers other than moly that you'll never see in any UOA/VOA here or at PQIA.
Anyone who's run a variety of oils in an engine over many miles knows that there are differences.
What causes them I have no idea, although we do have a couple of active members who would know.
Maybe they'll join this thread?
New oil always seems smoother and quieter than the oil just drained, even if the new oil is exactly the same as the old oil.
Some think that moly, boron and titanium adds contribute to smoother running, but I've had oils with none of the above seem mighty smooth.
There are also friction modifiers other than moly that you'll never see in any UOA/VOA here or at PQIA.
Anyone who's run a variety of oils in an engine over many miles knows that there are differences.
What causes them I have no idea, although we do have a couple of active members who would know.
Maybe they'll join this thread?
M1 0W-40 has made my 2004 Rainier 5.3L V8 sound like a diesel compared to the Maxlife Blend 5w30 I had in there prior. Tons of valve noise and the piston slap is worse too. The engine sounds like death with the M1. ~85k miles are on it.
I still have another half dozen quarts of M1 0W-40 on the shelf, so it'll either get dumped in the Honda, dumped in the mower, or relegated to top off use for the Buick.
I still have another half dozen quarts of M1 0W-40 on the shelf, so it'll either get dumped in the Honda, dumped in the mower, or relegated to top off use for the Buick.
MolaKule
Staff member
Originally Posted By: Swift101
Does anyone know what properties make one oil quieter than another?
I've read a lot of posts saying M1 is usually louder than PU in a given engine for example.
Is there any truth to this?
It is a special additive called, "SHHH." Very expensive and only comes from Ukranian labs.
I think you meant to say, "What attributes of an oil quiets a noisy engine."
What noise are you referring to? Tappet noise, piston slap?
Does anyone know what properties make one oil quieter than another?
I've read a lot of posts saying M1 is usually louder than PU in a given engine for example.
Is there any truth to this?
It is a special additive called, "SHHH." Very expensive and only comes from Ukranian labs.
I think you meant to say, "What attributes of an oil quiets a noisy engine."
What noise are you referring to? Tappet noise, piston slap?
Originally Posted By: 440Magnum
Originally Posted By: Swift101
Does anyone know what properties make one oil quieter than another?
One thing and one thing only: EXPECTATION!!!!
I have to agree.
Of all the oils I've used; different brands, grades and chemistries I have never noticed any difference to how an engine sounds at least at normal operating temp's.
On start-up particularly sub-freezing temp's I've noticed at difference but that's strictly a viscosity issue.
Originally Posted By: Swift101
Does anyone know what properties make one oil quieter than another?
One thing and one thing only: EXPECTATION!!!!
I have to agree.
Of all the oils I've used; different brands, grades and chemistries I have never noticed any difference to how an engine sounds at least at normal operating temp's.
On start-up particularly sub-freezing temp's I've noticed at difference but that's strictly a viscosity issue.
Originally Posted By: MolaKule
Originally Posted By: Swift101
Does anyone know what properties make one oil quieter than another?
I've read a lot of posts saying M1 is usually louder than PU in a given engine for example.
Is there any truth to this?
It is a special additive called, "SHHH." Very expensive and only comes from Ukranian labs.
I think you meant to say, "What attributes of an oil quiets a noisy engine."
What noise are you referring to? Tappet noise, piston slap?
LOL...
In over 47 years of vehicle ownership the only thing I found that caused a noisy engine was when I added a quart of Risone to a 390 in a '64 Ford... Was a engine I'd recently swapped and it had all the std claims to clean engine, quiet valves, yada, yada(I believe it was mostly a counterpart to MMO, as it was about like kerosene)... Anyway even though it was a hydraulic cam engine, sounded as it had a mechanical camshaft, was bad enough that I called a friend and asked if he'd come by the house next day while I was working and change the oil... I had a date 45 mi away the next evening, and wasn't going to have time myself... And that's probably the only time in my life I didn't perform my own OC... Moral, coochie trumps oil changes...
After that experience I'e stayed away from snake oils and have gotten along just fine... I have added Bearin' Seal to stop leaks in a diesel Olds that for the most part did what it claimed...
Originally Posted By: Swift101
Does anyone know what properties make one oil quieter than another?
I've read a lot of posts saying M1 is usually louder than PU in a given engine for example.
Is there any truth to this?
It is a special additive called, "SHHH." Very expensive and only comes from Ukranian labs.
I think you meant to say, "What attributes of an oil quiets a noisy engine."
What noise are you referring to? Tappet noise, piston slap?
LOL...
In over 47 years of vehicle ownership the only thing I found that caused a noisy engine was when I added a quart of Risone to a 390 in a '64 Ford... Was a engine I'd recently swapped and it had all the std claims to clean engine, quiet valves, yada, yada(I believe it was mostly a counterpart to MMO, as it was about like kerosene)... Anyway even though it was a hydraulic cam engine, sounded as it had a mechanical camshaft, was bad enough that I called a friend and asked if he'd come by the house next day while I was working and change the oil... I had a date 45 mi away the next evening, and wasn't going to have time myself... And that's probably the only time in my life I didn't perform my own OC... Moral, coochie trumps oil changes...
After that experience I'e stayed away from snake oils and have gotten along just fine... I have added Bearin' Seal to stop leaks in a diesel Olds that for the most part did what it claimed...
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Originally Posted By: TFB1
coochie trumps oil changes...
coochie trumps oil changes...
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