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#2575145 - 03/21/12 05:01 PM 0w-40 or 5w-40 for hot summers in audi with turbos
audia6 Offline


Registered: 03/12/12
Posts: 43
Loc: texas
Hi the car in question is a audi 2.7t with twin turbos.

so far i have used mobile 1 0w-40 car now has 77k. I have read that 0w-40 is not a good oil to use in summers because it is a thinner oil than 5w-40 from a couple of posts over at audiworld/forums.

I want to stick to vw approved oil and to make the oil a bit thicker should i try 5w-40 valvoline for the summers? The location is texas (where summer basically never ended) lol

i dont understand if both oils are 40 weight in the heat why would people say 0w-40 is bad for summers? shouldn't they provide the same protection in the heat?

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#2575149 - 03/21/12 05:05 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
Rand Online   content


Registered: 08/20/03
Posts: 8474
Loc: Barberton,Ohio
m1 0w40 is a world class product.. it passes many stringent tests..

40wt is a grade.. or a range. its not one specific number


Edited by Rand (03/21/12 05:05 PM)
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#2575159 - 03/21/12 05:10 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
SteveSRT8 Offline


Registered: 10/10/08
Posts: 15895
Loc: Sunny Florida
technically the M1 0w-40 is a bit thinner than many 40's, but it is recommended by so many high performance cars that I can't imagine why you'd want anything else.

Thinner will yield LOWER oil temps, actually better for the engine.
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#2575163 - 03/21/12 05:12 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
JHZR2 Offline



Registered: 12/14/02
Posts: 35293
Loc: New Jersey
Thinner???

What is the viscosity of each product at 100F? The viscosity may be slightly different, but not extreme, else it would be a 30wt!

NOACK and ht/HS will determine which is possibly more robust.

That said, M1 is a top notch product holding a huge number of mfr certifications.

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#2575174 - 03/21/12 05:23 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
m6pwr Offline


Registered: 03/07/08
Posts: 204
Loc: San Diego, CA
0wXX is just a way for mfr to say that oil has extra pour point depressant. To be virtually 0wXX the oil would have to pass through the viscosimeter instrument instantaneously - - in 0 Saybolt seconds or whatever at the low temp - - a physical impossibility I think. 0w40 is 5w40 with extra pour point depressant to make it flow a little faster at very cold temps (nothing wrong with that).

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#2575179 - 03/21/12 05:31 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
Doug Hillary Offline


Registered: 05/30/03
Posts: 4922
Loc: Airlie Beach Australia
Hi,
audia6 - Welcome to BITOG

You will be best served by staying with M1 0W-40
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Regards
Doug

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#2575180 - 03/21/12 05:32 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: m6pwr]
bruno Offline


Registered: 10/08/07
Posts: 416
Loc: new Jersey
Oil viscosities are labels and not engineering terms . The only reason there is an '0 ' label is the specs were set way before such light weights were contemplated .
' 0 ' weight just means the oil's cold flow characteristics fall within certain limits .

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#2575187 - 03/21/12 05:45 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
fdcg27 Offline


Registered: 09/25/09
Posts: 10308
Loc: OH
There are 5W-40s that meet the spec for your Audi, but then so do M1 0W-40 and Syntec 0W-30.
I'd personally use any oil meeting the appropriate spec in your car in any weather.
You cannot hurt the engine using an oil appropriate to the Audi (really VW) spec.
Ignore the viscosity rating, and pay attention to the specs listed in your OM and on the bottles of oil you intend to use.
_________________________
12 Accord LX 30K TGMO 0W-20
09 Forester 67K PU 5W-30
02 Accord 134K GOil 5W-30
01 Focus ZX3 101K Meijer Syn 5W-20
95 BMW 318iC 150K Defy 10W-40

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#2575189 - 03/21/12 05:46 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
toneydoc Offline


Registered: 12/16/11
Posts: 1197
Loc: War Eagle
If the oil has served you well so far, and the price will be the same, I would stick to using the 0w40 as it meets specs. The 0w40 may flow slightly better on startup but the 40 is what you need for TX summer. welcome
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#2575192 - 03/21/12 05:49 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
edyvw Online   content


Registered: 03/08/12
Posts: 1373
Loc: Colorado Springs
Originally Posted By: audia6
Hi the car in question is a audi 2.7t with twin turbos.

so far i have used mobile 1 0w-40 car now has 77k. I have read that 0w-40 is not a good oil to use in summers because it is a thinner oil than 5w-40 from a couple of posts over at audiworld/forums.

I want to stick to vw approved oil and to make the oil a bit thicker should i try 5w-40 valvoline for the summers? The location is texas (where summer basically never ended) lol

i dont understand if both oils are 40 weight in the heat why would people say 0w-40 is bad for summers? shouldn't they provide the same protection in the heat?


Keep using that oil. I live i Alabama where humidity make you think several times of year to kill yourself and temperature goes often to 110.
In 1.8T I always used Castrol 0W30 (GC) which is thick 30 oil, but still much thinner than Mobil 1. Never had issues and served me much better than Castrol 5W40.
_________________________
10' VW CC 2.0T (Castrol 0W40+OEM-Mann)
11' VW Tiguan 2.0T (M1 0W40+OEM-Mann)

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#2575194 - 03/21/12 05:49 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
mongo161 Offline


Registered: 07/11/10
Posts: 3301
Loc: Coney Island, NY
Can you run Dino?

If you can run Dino there are plenty of great 15w-40 oils on the market that would do you well for a hot summer run.

Plenty of lubrication, protection and great cleaning. I like to run a mixed blend of Dino and Synthetic in the summer for the qualities of both products.

Welcome!
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#2575203 - 03/21/12 05:58 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: mongo161]
edyvw Online   content


Registered: 03/08/12
Posts: 1373
Loc: Colorado Springs
Originally Posted By: mongo161
Can you run Dino?

If you can run Dino there are plenty of great 15w-40 oils on the market that would do you well for a hot summer run.

Plenty of lubrication, protection and great cleaning. I like to run a mixed blend of Dino and Synthetic in the summer for the qualities of both products.

Welcome!

I would rather run any 5W30 than dino 15W40 in the summer because of the stability of oil. Especially in VW engines.
_________________________
10' VW CC 2.0T (Castrol 0W40+OEM-Mann)
11' VW Tiguan 2.0T (M1 0W40+OEM-Mann)

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#2575234 - 03/21/12 06:26 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: mongo161]
Flying_A Offline


Registered: 10/14/11
Posts: 176
Loc: San Francisco, CA
Originally Posted By: mongo161
Can you run Dino?

If you can run Dino there are plenty of great 15w-40 oils on the market that would do you well for a hot summer run.

Plenty of lubrication, protection and great cleaning. I like to run a mixed blend of Dino and Synthetic in the summer for the qualities of both products.

Welcome!


There is no dino oil that meets his engine spec/approval. Don't due this^^^^
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12 CRG Blackstar Parilla Leopard: Redline 2 stroke racing oil

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#2575243 - 03/21/12 06:28 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: audia6]
dparm Offline


Registered: 04/19/10
Posts: 12612
Loc: Chicago, IL
The Mobil 1 0w40 is a good buy for year-round use in almost any Euro engine.
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#2575282 - 03/21/12 07:11 PM Re: 0w-40 or 5w-40 for hot summers in audi with turbos [Re: Flying_A]
fdcg27 Offline


Registered: 09/25/09
Posts: 10308
Loc: OH
Mongo may have a good point.
The HDEO fleet oils he refers to are primarily intended for use in heavy turbo diesel engines.
The reason these oil have none of the appropriate Euro approvals may be that their makers don't bother.
Their makers aren't marketing these oils to the turbo car crowd, but to the eighteen wheel turbo diesel gang.
The OP's Audi is still too young for such experimentation, but once the Audi's mileage is doubled, he might consider a dual rated HDEO.
HDEO 5W-40 is popular among turbo Subie owners, and I doubt that the Audi is any harder on oil than is a turbo Subaru.
Rotella T6 has shown good UOAs in turbo Subes as well as in some VW applications.
HDEOs have considerable long drain potential as well.
Mongo is not as far off base as you might think, certs or not.
_________________________
12 Accord LX 30K TGMO 0W-20
09 Forester 67K PU 5W-30
02 Accord 134K GOil 5W-30
01 Focus ZX3 101K Meijer Syn 5W-20
95 BMW 318iC 150K Defy 10W-40

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