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Motor Oil Selection - Decision Making Process #4650548
01/29/18 07:57 PM
01/29/18 07:57 PM
Joined: Jan 2018
Posts: 7
Calgary, Canada
nielkfj Offline OP
nielkfj  Offline OP
Joined: Jan 2018
Posts: 7
Calgary, Canada
Thanks to the respondents to my other thread for recommendations on a motor oil for my 2013 GTI.

In this thread I’d like to ask about the primary factors that I should consider when selecting motor oil in the future.

I assume the most important factor would be ensuring that the oil meets the OEM specification (VW 502.00 or 503.00 or 504.00). But what are the other important factors to consider - such as other OEM specs that are listed on the bottle, or specific physical properties of the oil?

For example here are some other manufacturer specs I've seen mentioned:

Porsche A40
MB 229.5
BMW LL-01

And here are some physical properties I've seen mentioned:

NOACK volatility (lower is better)
HT/HS viscosity (higher is better)
Sulfated Ash content (lower is better)
Mini-Rotary Viscometer at low temp (lower is better)

Are there other important physical properties or OEM specification to consider, and how would you rank them in order of importance?


2013 VW GTI Base Model (Canadian) - 100% stock
Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650553
01/29/18 08:02 PM
01/29/18 08:02 PM
Joined: Mar 2014
Posts: 3,245
NJ
Leo99 Offline
Leo99  Offline
Joined: Mar 2014
Posts: 3,245
NJ
I trust in the OEM to set the specs they think are important. No need to overthink it.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles
2004 Rav4 359,000 miles
2015 Camry 59,000 miles
Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650563
01/29/18 08:13 PM
01/29/18 08:13 PM
Joined: Mar 2013
Posts: 4,755
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,755
The Midwest
I don't think higher is better for HT/HS. I don't think it matters as long as it is 3.5 or higher.
I replaced the intake manifold on my GTI around 80K miles and cleaned the intake valves while I was at it. It is not a difficult repair or expensive repair.
The Humble Mechanic has a video on it.
https://www.ecstuning.com/b-genuine-volk...bd/06j133201bh/


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Motor Oil Selection - Decision Making Process [Re: skyactiv] #4650578
01/29/18 08:36 PM
01/29/18 08:36 PM
Joined: Jun 2016
Posts: 2,960
MN
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 2,960
MN
Originally Posted By: skyactiv
I don't think higher is better for HT/HS. I don't think it matters as long as it is 3.5 or higher.

HTHS must be greater than X. Higher just means you have more than you need, and fuel economy & cold flow suffers.
The value of "X" is communicated by the manufacturer using the spec they mention. For example, some engines require >2.9, others are at >3.4, etc.
Going with less HTHS than the spec means there could be excess wear, or in severe cases, spun bearings.

Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650642
01/29/18 10:26 PM
01/29/18 10:26 PM
Joined: Apr 2016
Posts: 1,530
Oregon
1JZ_E46 Offline
1JZ_E46  Offline
Joined: Apr 2016
Posts: 1,530
Oregon
Find an oil that meets all 4. VW 502 is generally regarded as the “easiest” of the top 4 euro A3/B4 oil certifications to pass.

Castrol, Motul, and Pennzoil all make oils that meet main 4.


2007 X5 4.8i: M1 HM 10W-30
2016 Countryman S: EDGE 0W-30
Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650666
01/29/18 10:58 PM
01/29/18 10:58 PM
Joined: Oct 2014
Posts: 11,819
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 11,819
Idaho
The manufactures recommendations are what you want, the rest is going to be sport.


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650698
01/30/18 12:28 AM
01/30/18 12:28 AM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline
Joined: Jul 2017
Posts: 542
Texas (south)
I would use a German-made oil like Motul or LiquiMoly which what people over there in Germany use


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650726
01/30/18 03:29 AM
01/30/18 03:29 AM
Joined: Dec 2011
Posts: 4,731
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,731
North Carolina
Originally Posted By: CT8
The manufactures recommendations are what you want, the rest is going to be sport.

Exactly. Generally, the more specs it meets, the better, but they're all pretty much interchangeable. It's safe to just pick the coolest-looking bottle.

Originally Posted By: FermeLaPorte
I would use a German-made oil like Motul or LiquiMoly which what people over there in Germany use

Motul is French.


"Zed's dead baby, Zed's dead."
Re: Motor Oil Selection - Decision Making Process [Re: FermeLaPorte] #4650730
01/30/18 03:50 AM
01/30/18 03:50 AM
Joined: Mar 2012
Posts: 5,256
Colorado Springs
edyvw Offline
edyvw  Offline
Joined: Mar 2012
Posts: 5,256
Colorado Springs
Originally Posted By: FermeLaPorte
I would use a German-made oil like Motul or LiquiMoly which what people over there in Germany use

Liqui Moly is average oil at best. Just because it has huge letters that says: MADE IN GERMANY, does not mean it is better then other ones.
Motul is French! Motul did not update its products for like 10 years.


15' Toyota Sienna AWD (Mobil1 0W20 EP+ FRAM Ultra).
11' VW Tiguan 2.0T (Castrol 0W40+MANN filter)
Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650742
01/30/18 05:24 AM
01/30/18 05:24 AM
Joined: Oct 2010
Posts: 8,785
Virginia Beach
Astro14 Online content
Astro14  Online Content
Joined: Oct 2010
Posts: 8,785
Virginia Beach
Things to consider:
1. What meets spec for your car
2. What is available

In my neck of the woods, Mobil 1, at $23/5quart jug from Walmart meets the above. And UOA has verified that it works well in my German car.

No need to obsess...


32 Packard 15W40
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Pennzoil Ultra
Re: Motor Oil Selection - Decision Making Process [Re: Astro14] #4650782
01/30/18 06:52 AM
01/30/18 06:52 AM
Joined: Dec 2002
Posts: 40,834
'Stralia
Shannow Offline
Shannow  Offline
Joined: Dec 2002
Posts: 40,834
'Stralia
Originally Posted By: Astro14
Things to consider:
1. What meets spec for your car
2. What is available


Too true.

Start with the OEM specs, actually licenced, not meets or exceeds, or recommended for. Actual licence.

Then you are good to go.

Then if the oil you have throws in things like DEXOS, Honda HT-06, ACEA, the Porsche spec then grab them with both hands if it's at your price point.

They are all there because the OEMs found that there was an issue with their kit that "plain vanilla" didn't work with.

When it comes to an API/ACEA spec, they all lobby to have their issue included in the standard raft, spreading the cost over all the bottles sold. If they don't get in, and there's enough of an issue for them, they go it alone, and make their own spec.

Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4650854
01/30/18 09:03 AM
01/30/18 09:03 AM
Joined: Dec 2005
Posts: 9,874
Upper Midwest
kschachn Online content
kschachn  Online Content
Joined: Dec 2005
Posts: 9,874
Upper Midwest
Originally Posted By: nielkfj
For example here are some other manufacturer specs I've seen mentioned:

Porsche A40
MB 229.5
BMW LL-01

And here are some physical properties I've seen mentioned:

NOACK volatility (lower is better)
HT/HS viscosity (higher is better)
Sulfated Ash content (lower is better)
Mini-Rotary Viscometer at low temp (lower is better)

Are there other important physical properties or OEM specification to consider, and how would you rank them in order of importance?

Those specifications already specify the other things you mention.


1994 BMW 530i, 228K
1996 Honda Accord, 263K
1999 Toyota Sienna, 400K
2000 Toyota ECHO, 271K
Re: Motor Oil Selection - Decision Making Process [Re: edyvw] #4650925
01/30/18 10:18 AM
01/30/18 10:18 AM
Joined: May 2012
Posts: 1,333
Winchester, Indiana
SubieRubyRoo Offline
SubieRubyRoo  Offline
Joined: May 2012
Posts: 1,333
Winchester, Indiana
Originally Posted By: edyvw
Motul did not update its products for like 10 years.


I've only used Motul Gear 300, but maybe, just maybe, it's possible that their products as they were designed 10 years ago, were forward-looking and well-engineered enough that the 10 year timelapse was just allowing other manufacturers to catch up? SN has been in effect since 2010, so it's possible that if their products were only designed to exceed SN, well, then they haven't necessarily NEEDED a change. All depends on the intended market and what specifications they're looking to meet.

Re: Motor Oil Selection - Decision Making Process [Re: Leo99] #4650983
01/30/18 11:08 AM
01/30/18 11:08 AM
Joined: May 2014
Posts: 3,661
Columbus,Nebraska
Yah-Tah-Hey Offline
Yah-Tah-Hey  Offline
Joined: May 2014
Posts: 3,661
Columbus,Nebraska
Originally Posted By: Leo99
I trust in the OEM to set the specs they think are important. No need to overthink it.
There's really not much "overthinking" on the forum Leo. Pray tell where did you come up with such a crazy notion? Regards

Re: Motor Oil Selection - Decision Making Process [Re: nielkfj] #4651068
01/30/18 12:35 PM
01/30/18 12:35 PM
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
The HTHS is driven by bearing clearances, sump temps and RPM range. Has your engine been modified? Does it see track days? Do you spend long stretches at redline? Answer yes to any of these and you must make adjustments.

I always start with the Porsche A40 list if track days will be involved smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
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