Quieter engine

TR Graham · Mar 29, 2005

From the time I first dumped the original dino fill at 2000 miles, I've used Mobil 1 5w30 in my 2002 Tacoma. Engine is a 3.4 liter V6. My truck always had a bit of valvetrain noise, regardless of the filter used (factory Toyota, M1, K&N, or PureOne).

This afternoon I changed the oil, but instead of the M1 5w30 I normally run, I tried M1 10w30 EP (after doing a bit of research on this board) with a PureOne filter. Starting the truck to check for leaks, I was pleasantly surprised to hear a significant reduction in engine noise. The idle smoothed out as well.

I think I should have done this a long time ago......

buster · Mar 29, 2005

quote:

This afternoon I changed the oil, but instead of the M1 5w30 I normally run, I tried M1 10w30 EP (after doing a bit of research on this board) with a PureOne filter. Starting the truck to check for leaks, I was pleasantly surprised to hear a significant reduction in engine noise. The idle smoothed out as well.

This is the same experience many others are having with it and those that run Amsoil S2k/Redline. More additized oil I believe with more SuperSyn PAO.

sully · Mar 29, 2005

We haven't started seeing any UOA's on this oil yet but for the money I think it's going to be hard to beat. IMHO.

zebra14 · Mar 29, 2005

I wonder if switching from 5w30 to 10w30 had a hand in quieting things down?

TR Graham · Mar 29, 2005

Which is what I thought as well.......

buster · Mar 29, 2005

quote:

I wonder if switching from 5w30 to 10w30

Could very well be.

guile · Mar 29, 2005

quote:

zebra14
I wonder if switching from 5w30 to 10w30 had a hand in quieting things down?

TR Graham
Which is what I thought as well.......

buster
Could very well be.

I run 5w30 Mobil 1 in the winter and 10w30 Mobil 1 (now Mobil 7500) in the summer in my 98 Civic ... every time I make the switch to the 10w I notice a significant reduction in engine noise.

Bryanccfshr · Mar 29, 2005

Is valvetrain noise intensity an indicator of anything other than viscous dampening of noise?

My 3.4 got quieter after I started using FP. The injecor noise was always more than the valvetrain.

Bryanccfshr · Mar 29, 2005

Duplicate post, please DELETE

Bagger_Matt · Mar 29, 2005

500 miles ago I switch from M1 5w30 to M1 10w30
at 10,000 miles on my 04 3.4 tacoma. I used to notice to valve train noise but now its much quieter. But still not gone.

Brons2 · Mar 29, 2005

Noise in my engine when driving to work (only 2.7 miles from my house) is definitely higher with the 10w30 than the 5w30. However, now that it's getting warmer here in Austin, Texas it's less noticeable.

TallPaul · Mar 29, 2005

quote:

Originally posted by JohnnyO:
I've seen that happen too. Also my van is quieter with Max Life 10w30 than with Havoline 10w30.

Assuming the Maxlife is mostly Group I and the Havoline is mostly Group II and considering that maybe my engine is louder with the Group III I am now running vs the Quaker State dino I last ran, I am thinking that maybe as you go up in the base oil group structure and the molecular size distribution tightens up that the greater uniformity of the molecular arangement results in higher sound transmission? Also the additive pack effect, with presumably the higher levels of additives having some effect. Would metals increase or buffer sound?

dickwells · Mar 29, 2005

Like we say in the Quality game: "In God we trust, all others bring data." In these cases preferably either double blind test or true sound meter readings.

Blue99 · Mar 29, 2005

quote:

I last ran, I am thinking that maybe as you go up in the base oil group structure and the molecular size distribution tightens up that the greater uniformity of the molecular arangement results in higher sound transmission?

TallPaul - Save this quote somewhere, it's the best summary of the general concept we have discussed thru several previous threads!

M1 PAO's, even the 5W-40 T&SUV, generate more engine noise in my GM 5.3L engine. I would expect some of the new GF-4/SM GRP III's such as Clean 5000 to also create more noise.

But the Citgo 10w30 GRP III with an HTHS of 3.5 was quiet in my engine during Jan-Feb of this past winter. This may be due to higher viscosity GRP III base oils & a healthy add pack.

JohnnyO · Mar 30, 2005

quote:

Originally posted by TallPaul:
I am thinking that maybe as you go up in the base oil group structure and the molecular size distribution tightens up that the greater uniformity of the molecular arangement results in higher sound transmission? Also the additive pack effect, with presumably the higher levels of additives having some effect. Would metals increase or buffer sound?

Uh, yeah. Couldn't have said it better myself.

TallPaul · Mar 30, 2005

I was just doing what we called in college, a "mind dump." But apparently by osmosis this stuff got in there from browsing around on this site. I kind of like to hear the engine noises so long as it is like a sewing machine sound, not a lot of clattering.

tenderloin · Mar 30, 2005

In these cases preferably either double blind test or true sound meter readings.

What? And ignore the all knowing and all telling ear test and butt dyno? No way.I am a believer in both.

TR Graham · Mar 30, 2005

Exactly.... This is NOT "scientific testing", just a plain 'ol God-given Mark 1 Mod 0 ear.

A deaf man or an anal-compulsive might need a fancy test meter to confirm something as simple (and obvious) as this, but my ears work just fine. I've had this truck since new. After 3 years and 67,000 miles I know what the engine sounded like with 5w30.

My ears tell me that the engine is quieter and smoother using 10w30 oil.

JohnnyO · Mar 30, 2005

I've seen that happen too. Also my van is quieter with Max Life 10w30 than with Havoline 10w30.

dickwells · Mar 30, 2005

Sure, Sure, the check is in the mail, I'll love you in the morning, and "its only a cold sore".

Quieter engine

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