Is 0w40 oil too heavy for 1.6L gasoline engine?

[adiposis]

For the past two years, I've used Mobil 1 0w40 in the '05 Hyundai Matrix 1.6L gasoline engine. But, Somebody told me that 0w40 oil is too heavy for my car and Hyundai manual recommends that "SAE 10w30, 5w30, 0w30" is suitable.

But, I didn't feel any problem in using 0w40 oil except some noise.

Can I fix it? If not, can u help me choose another oil in Mobil 1 products list?

Thanks~

 

[bmwtechguy]

The only thing you may be hurting is your fuel economy. Mobil 1 0W40 is a good product with a wide operating temp range. What kind of noise are you hearing and when did it start? Is it only when you start your engine, or all the time?

 

[adiposis]

Thx for your reply. especially, in cold starting, I felt the engine sound is louder as compared with genuine Hyundai OEM engine oil (groupe II/III). But, i dun think that was serious problem. My petty worry is just "can i fix 0w40? or can i substitute Mobil 1 5w30/10w30 for Mobil 1 0w40"

thx~

 

[Quest]

If 0W40 sounds too noisy (because it's too thick??) to you then you shall seriously consider going down to 5W30.

 

[adiposis]

I found that the major difference between 0w40 and 5w30 is the HTHS. The HTHS of M1 0w40 is over 3.5cP, and that of M1 5w30 is below 3.0cP. Is there any problem in substitution?

Please, teach me the newb oil guy.

 

[Quest]

Your Hyundai is definitely on the lighter side of motor oil.

While the HSTS between 0W40 and 5W30 is quick close (not quite), I would not go with 0W40 unless my car calls for 10W30 or thicker typical). If you can get 0W30 it would be so much better too.

South Korea has temporate climate simlar to Western part of Canada (it can get cold sometimes during the winter) so I would not hesitate in recommending 5W30 to you. M1, Pennzoil or even any API/ILSAC certified local blend full synthetic would work nicely in your car.

 

[moribundman]

What oil do Hyundai dealerships use in Korea?

 

[adiposis]

" While the HSTS between 0W40 and 5W30 is quick close (not quite), I would not go with 0W40 unless my car calls for 10W30 or thicker typical). If you can get 0W30 it would be so much better too. "

Could u expound this meaning to poor oil newbie? (T_T)

 

[adiposis]

moribundman >> mainly, from SK Corp, and Kixx (GS-Caltex co.)

 

[AndyH]

Quote:

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For the past two years, I've used Mobil 1 0w40 in the '05 Hyundai Matrix 1.6L gasoline engine. But, Somebody told me that 0w40 oil is too heavy for my car and Hyundai manual recommends that "SAE 10w30, 5w30, 0w30" is suitable.

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I would try a 0w30 or 5w30 oil (Mobil 1 would be fine) and see if the noise goes away.

 

[clembrewer]

I've used a mix of Castrol Syntek 0w30 and Mobil 1 0w-40 in my Accent with the 1.6L. The car loved it, responsive, fast, and my best mpg to date. I was able to average 38mpg with this mix in the engine.

Personally I think my 1.6L likes the heavier oil as opposed to the lighter oils. I've tried other 5w30s but I don't like the way the car sounds/feels with them.

If I were you I would add a bit of VSOT (Valvoline Synpower Oil Treatment), or it's equivalent, to the oil and see if that makes a difference.

 

[TR3-2001SE]

Excellent choise in oil Mobil 1 0-40. Only exception is very cold weather. My milage has been excellent using this oil compaired to mobil 1 10w30. Cold weather starting is its only weakness. If I lived in an area where the temp. went below 0 degrees F I would use the Mobil 1 5w30 EP which has the best cold starting of a 30 weight or 0-20 mobil 1 if you are a 20 weight guy.

 

[Gene K]

Mobil 1 0W-40 is very close to a 30 weight to begain with. You can try 5w30 if you want but I would not expect any major difference in valvetrain noise. Might get a SLIGHT gain in MPG with the 5w30.

 

[JohnBrowning]

You should not need to change a thing. M1 0W40 is not very thick at all and shear's in use to a about the same spec as M1 0W30. It is a 0W rated oil and as such is good to the 0W cold temp. rateing so you will gain nothing per say useing 0W30 or 0W20 or any other 0W viscosity. M1 5W30 has not been tested down to as cold of temp.'s as the M1 0W40 or it would be rated as such! If your engine was haveing an issue with M1 0W40 why would you wait 2 years to ask about it? It all sounds fishy to me!! I also think the fact that the engine has done fine for two consecutive years on it is all the proof you need. Maybe a winter UOA just to make you feel warm and fuzzy.

 

[Curious Kid]

If I wasn't feeling so lazy right now I'd paste some info from a spreadsheet I did showing calculated viscosities for various oils. The point being, though a 0w-40 weight oil has the 0w rating, IIRC, it's viscosity for all but approaching the coldest end of the spectrum (last few deg.c?), is higher than that for a 5w30 (M1:M1...SL formulations - data too old?). The 0w30 would be much closer to 5w30, with the exception being that it doesn't reach pumping figure limits till 5 deg.c colder than the 5w rated oil.

Unless you feel/see a need for a x40wt at temp, use the x30wt variety. Of course, trending UOA's would help provide more significant reasoning, though I understand not having done such myself.

 

[427Z06]

How much does M1 cost in Korea?


Code:

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Calculated Kinematic Viscosity in cSt, Temps in Centigrade



T(C) M1 0W40 * M1 SM 5w30

-20° 2661.5 2604

-10° 1197.8 1107

0° 599.3 531

10° 327.6 281

20° 192.9 161

30° 121.0 99

40° 80.0 64.8

50° 55.4 44.4

60° 39.8 31.7

70° 29.7 23.5

80° 22.7 18.0

90° 17.8 14.1

100° 14.3 11.3

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[adiposis]

Quote:

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How much does M1 cost in Korea?


Code:

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Calculated Kinematic Viscosity in cSt, Temps in Centigrade

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There r 2 types of M1 0w40 in Korea.



Made in USA (1qt; 946ml) → about 9~10 USD

Made in Singapore (1litre) → about 14~15 USD



Frankly speaking, I dunno what is the diffrence......

 

[Gary Allan]

Wow, there's a premium to be paid for buying (relatively) local.

Did I see the service that this vehicle sees? Highway? All local? % of mix? When judging the suitability of any visc, it has to be indexed for the environment. Not necessarily for true suitability ..but for your perception of visc. Every oil is thicker or thinner depending on where you look at it. Someone saying 0w-40 is too thick in SoCA is also saying that 0w-20 is too thick in -20 to -40 Canadian winters. He/she can be correct in both statements ..but, as you can see, the weight behind it loses a bit of smoke when you compare.

You want the lightest oil that can do the job ..based on availability (which can vary). This is more critical in a short trip environment as it impact fuel economy more then when normalized temps are reached.

 

[427Z06]

Quote:

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If I lived in an area where the temp. went below 0 degrees F I would use the Mobil 1 5w30 EP which has the best cold starting of a 30 weight...

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Not anymore:

Code:

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T(C) Syntec 5w30 GC 0W30 M1 EP 5w30

-20° 2079 2609 2238

-10° 889 1127 974

0° 429 547 475

10° 229 292 256

20° 132 169 149

30° 82 104 93

40° 54.0 68.4 61

50° 37.3 47.0 42.1

60° 26.8 33.7 30.3

70° 20.0 25.0 22.6

80° 15.3 19.1 17.3

90° 12.1 15.0 13.7

100° 9.7 12.0 11.0

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