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#4480366 - 08/06/17 12:20 AM New to the game...OW40 Amsoil vs Castrol
eksigned Offline


Registered: 05/27/10
Posts: 4
Loc: Seattle, WA
Evening folks,

I've been trying to understand this crazy world of oils here. I've been a fan of amsoil for quite some time - UOA on my previous G37 always turned out great, at least...in the the eyes of an amateur. Despite, would love to utilize amsoil again on my '18 BMW 440i, and upon doing some research, it seems that Castrol's OW40 is a popular choice. I understand HTHS and that essentially...the higher the better. I've also come to understand that O weight oils tend to do better in either spectrums (cold vs hot).



These two are the info sheets that I found. It seems to be that amsoil performs better? But because I cannot quantify this data, I have honestly no idea if amsoil's seemingly better performance is large enough to warrant using amsoil vs castrol. My commute as of next month, will only be 10 minutes in CA weather (Loma Linda). I drive more aggressively than most (currently in Seattle); I do not care about gas mileage, rather would be happier knowing that I am running an oil that provides more protection, but am concerned that the car will take a hit while driving only a ten minute commute, where my motor will likely not reach normal operating temperatures. Any thoughts would be GREATLY appreciated! Thanks guys!



Edited by eksigned (08/06/17 12:23 AM)

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#4480368 - 08/06/17 12:25 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
rooflessVW Offline


Registered: 12/24/11
Posts: 4078
Loc: North Carolina
Castrol wins on price, availability, and certifications.

But if you run Amsoil you will belong to a cult of people that can say: "I run Amsoil!"
_________________________
"Zed's dead baby, Zed's dead."

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#4480369 - 08/06/17 12:27 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
Rolla07 Offline


Registered: 11/05/11
Posts: 4740
Loc: MTL, CANADA
How does M1 0w40 compare to Castrol and Amsoil? With the rebates...it would make for a superb deal.
_________________________
2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967


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#4480371 - 08/06/17 12:34 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
aquariuscsm Offline


Registered: 12/30/06
Posts: 18178
Loc: Dallas,Tx USA
Pennzoil Platinum 0W40 too,with current $10 rebate makes it $15 a 5 quart jug.
_________________________
1996 Nissan 300ZX 5-speed,Arctic Pearl(#175 of 300)
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#4480384 - 08/06/17 01:38 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
Linctex Offline


Registered: 12/31/16
Posts: 6160
Loc: Waco, TX
Originally Posted By: eksigned
I would be happier knowing that I am running an oil that provides more protection, but am concerned that the car will take a hit while driving only a ten minute commute, where my motor will likely not reach normal operating temperatures. Any thoughts would be GREATLY appreciated! Thanks guys!


Pleas explain how you believe synthetic oil "provides more protection"...

In what way?

Protection against what, exactly?
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#4480395 - 08/06/17 02:25 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
Seventh Offline


Registered: 11/11/12
Posts: 234
Loc: NorCal
Your 2018 440i comes with free maintenance which you have already paid for in the purchase price of the car. Take advantage of it.

When the maintenance is expired continue using the oil spec the car calls for. There is no reason to use a 40wt oil for a 10 minute commute at all. Oil will never reach operating temp.

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#4480515 - 08/06/17 08:04 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
skyactiv Offline


Registered: 03/02/13
Posts: 4405
Loc: The Midwest
Those Amsoil four-ball wear test numbers aren't anything to brag about.
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#4480598 - 08/06/17 09:30 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
shanneba Offline


Registered: 07/10/04
Posts: 888
Loc: Indiana (IN)
Amsoil does not list a recommended oil for a 2017 440i. They do show a 0w-20 as the correct viscosity.

http://www.amsoil.com/lookup/auto-and-li...urbo/us-volume/

You like Amsoil, why not run the Signature Series 0w-20? Do a UOA and see how it performs, compare it to the BMW (Shell) oil the dealer uses for your free service.


Edited by shanneba (08/06/17 09:36 AM)
_________________________
2003 BMW 330Ci
2013 HD Sportster XL1200C

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#4480600 - 08/06/17 09:33 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
Kuato Offline


Registered: 10/23/05
Posts: 7094
Loc: Colorado
First of all, welcome to BITOG. Lots of good info here as well as strong opinions. I'll give you mine. laugh

In So Cal's moderate weather, there's no need for a 0w40 oil; you could go with 10w40 and never look back. However there are your warranty considerations so the advice to keep with specified oil under warranty is good in that respect. Taking advantage of free dealership oil changes? thumbsup

From experience, I've found that Amsoil's products perform very well, despite the lack of certifications - which seems to come from their reluctance to actually pay for those certifications.

The Edge is also a very good oil; you can't go wrong with either of your choices.


Originally Posted By: shanneba
Amsoil does not list a recommended oil for a 2017 440i. They do show a 0w-20 as the correct viscosity.

http://www.amsoil.com/lookup/auto-and-li...urbo/us-volume/

You like Amsoil, why not run the Signature Series 0w-20? Do a UOA and see how it performs compare it to the BMW (Shell) oil the dealer uses for your free service.


I belieive Amsoil's page hasn't been updated for the 2018 models yet; I believe the 20 weight specification is for the non-turbo model.
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Thick vs Thin test: 15k / 43k miles complete

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#4480607 - 08/06/17 09:38 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: Kuato]
shanneba Offline


Registered: 07/10/04
Posts: 888
Loc: Indiana (IN)
Originally Posted By: Kuato


I belieive Amsoil's page hasn't been updated for the 2018 models yet; I believe the 20 weight specification is for the non-turbo model.


Amsoil's page I linked shows the following info:

This vehicle is equipped with a turbocharger. Turbos create severe service conditions by dramatically increasing temperatures. AMSOIL synthetic motor oils provide excellent protection for turbocharged vehicles. When using AMSOIL Signature Series Synthetic Motor Oil, do not exceed the severe-service drain interval of 15,000 miles, 700 hours or one year, whichever comes first.
VISCOSITIES:
All TEMPS....0W-20


Edited by shanneba (08/06/17 09:39 AM)
_________________________
2003 BMW 330Ci
2013 HD Sportster XL1200C

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#4480681 - 08/06/17 11:17 AM Re: New to the game...OW40 Amsoil vs Castrol [Re: Kuato]
oil_film_movies Offline


Registered: 06/13/16
Posts: 2569
Loc: MN
Originally Posted By: Kuato
I belieive Amsoil's page hasn't been updated for the 2018 models yet; I believe the 20 weight specification is for the non-turbo model.

BMW 440i is only turbocharged, the B58. Seems weird, I know, but BMW says to use 0w20 in turbo engines.
That's why I'd be tempted to go up one viscosity grade, just a little, to a LL-01FE BMW TwinPower (Shell's) 0w30 branded oil, which raises HTHS a bit to 3.0.
I don't recommend going to Castrol Edge 0w40 which has an excessive HTHS 3.6 for this engine.

One could ask their BMW dealership to use BMW TwinPower 0w30 instead of their 0w20, they might agree to that.

Originally Posted By: eksigned
I understand HTHS and that essentially...the higher the better.
Not quite true. There is a "sweet spot". Too thick and you lose performance unnecessarily, and too thin and wear goes up.

BMW has pegged the BMW 440i engine at an HTHS of about 2.7. Running a 3.5 HTHS would be excessive.
Your engine will do OK on extra HTHS, but not better.
If you want a small extra cushion of HTHS, BMW will probably let you run an HTHS=3.0 in their LL-01FE 0w30 instead of the 0w20 HTHS=2.7 actually spec'ed.
Originally Posted By: eksigned
It seems to be that amsoil performs better?
Amsoil works, yet going by the fact that an oil actually IS MB 229.5, Porsche A40, and LL-01 is probably worth more than just "recommended for" as Amsoil claims. Amosil isn't officially certified in most cases. Castrol Edge is certified for all that, officially approved, not just saying "we think we're good enough" as Amsoil does.

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#4480855 - 08/06/17 02:04 PM Re: New to the game...OW40 Amsoil vs Castrol [Re: oil_film_movies]
eksigned Offline


Registered: 05/27/10
Posts: 4
Loc: Seattle, WA
this is GREAT information. appreciate the knowledge. BMW Riverside, as I've been informed, uses Castrol 5W30 in all their BMW cars (non-M). I wanted to use something along the same lines to prevent going back and forth between weights. I was planning on changing oil changes between the included intervals. will continue hunting!

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#4480861 - 08/06/17 02:08 PM Re: New to the game...OW40 Amsoil vs Castrol [Re: Linctex]
eksigned Offline


Registered: 05/27/10
Posts: 4
Loc: Seattle, WA
I suppose by "protection" I'm implying to your typical wear and tear - metal on metal, and protection from both short term drives where the engine does not warm to full operating temperature, as well as protection from high heat situations from more spirited driving. As for the synthetic oil claim, from the information that I've gathered, synthetic oils simply perform better against shearing and retain their original weights better than non-synthetic conventional oils...hence the claim ^


Edited by eksigned (08/06/17 02:09 PM)

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#4480866 - 08/06/17 02:12 PM Re: New to the game...OW40 Amsoil vs Castrol [Re: Seventh]
eksigned Offline


Registered: 05/27/10
Posts: 4
Loc: Seattle, WA
Originally Posted By: Seventh
Your 2018 440i comes with free maintenance which you have already paid for in the purchase price of the car. Take advantage of it.

When the maintenance is expired continue using the oil spec the car calls for. There is no reason to use a 40wt oil for a 10 minute commute at all. Oil will never reach operating temp.


Would you mind making a recommendation and why? I'm leaning towards 0W30 Castrol A3?

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#4481180 - 08/06/17 08:00 PM Re: New to the game...OW40 Amsoil vs Castrol [Re: eksigned]
IllinoisSparky Offline


Registered: 10/12/15
Posts: 255
Loc: Illinois USA
ek - Finding an oil that meets the manufacturer certs is more important than weight or brand name.

Find an oil that meets the BMW certification for your engine.
THEN you can start comparing the other specs for each oil.

Would hate to see that turbo damaged by improper lube!

Good luck. thumbsup
_________________________
04Ford Explorer PUP 5W-30/Amsoil EaO
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09 BMW X5 3.0i OEM 5W-30/OEM
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