Mobil 0W40 vs Castrol 0W40

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And we have way, way, way too many whitetail here. Of course, with whitetail, that can be darn near anywhere in the province.
wink.gif
 
Originally Posted By: Garak
And we have way, way, way too many whitetail here. Of course, with whitetail, that can be darn near anywhere in the province.
wink.gif


Some people have all the luck....haha I wish we had a whitetail population problem where I live.
 
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.

Mobil 1 0W-40 SN (US-made): Trinuclear moly, no titanium, no undesirable magnesium, much higher TBN, much higher VI.

Some people claim that Castrol is smoother. Is it smoother to drink? I don't know why an engine would run smoother at cold starts with an oil that is thicker when cold (has lower VI) and has less friction modifiers.
 
Originally Posted By: Gokhan
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.

The current formulation does contain titanium.
 
Originally Posted By: Gokhan
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.

Mobil 1 0W-40 SN (US-made): Trinuclear moly, no titanium, no undesirable magnesium, much higher TBN, much higher VI.

Some people claim that Castrol is smoother. Is it smoother to drink? I don't know why an engine would run smoother at cold starts with an oil that is thicker when cold (has lower VI) and has less friction modifiers.

Castrol has Titanium, and as far as I know it is Full-SAPS oil, same as M1, so it has pretty much same TBN, except M1 does not have that good TBN retention.
 
Originally Posted By: edyvw
Originally Posted By: Gokhan
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.

Mobil 1 0W-40 SN (US-made): Trinuclear moly, no titanium, no undesirable magnesium, much higher TBN, much higher VI.

Some people claim that Castrol is smoother. Is it smoother to drink? I don't know why an engine would run smoother at cold starts with an oil that is thicker when cold (has lower VI) and has less friction modifiers.

Castrol has Titanium, and as far as I know it is Full-SAPS oil, same as M1, so it has pretty much same TBN, except M1 does not have that good TBN retention.


It has had great TBN retention in the applications I've run it in
21.gif
 
Originally Posted By: OVERKILL
Originally Posted By: edyvw
Originally Posted By: Gokhan
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.

Mobil 1 0W-40 SN (US-made): Trinuclear moly, no titanium, no undesirable magnesium, much higher TBN, much higher VI.

Some people claim that Castrol is smoother. Is it smoother to drink? I don't know why an engine would run smoother at cold starts with an oil that is thicker when cold (has lower VI) and has less friction modifiers.

Castrol has Titanium, and as far as I know it is Full-SAPS oil, same as M1, so it has pretty much same TBN, except M1 does not have that good TBN retention.


It has had great TBN retention in the applications I've run it in
21.gif


Mine dropped to 2.7 in 5K on first UOA, second was 2.3 after 5K.
 
Originally Posted By: spasm3
How similar is the castrol 0w-40 to the famed german castrol 0w 30?
Originally Posted By: lubricatosaurus
Originally Posted By: Doug Hillary
Hi,GenaFishBeck - Sorry to intrude but the OP did NOT mention Pennzoil - see the heading - why then is a direct Sales Pitch for Pennzoil products relevant???


Get a nap. Site sponsor, and free oil. Gena, ignore Mr. Grumpy.



Is that right.

Doug Hillary is easily the most informed member we have here in the oil related field,from testing to actually contributing to the formulation of lubricants and you choose to run your mouth to him.
Doug.
I'd like to thank you for everything you contribute here at bitog and I for one will never ignore your posts. We are lucky to have you and I for one am thankful you share your knowledge and experience with us.
As far as ignoring goes I'm also thankful for that feature here and will be exploring its use immediately.
 
Regarding titanium, some VOAs I saw didn't show any for some reason, even though the package says fluid strength. I don't think it says titanium (says only fluid strength).

Regarding TBN retention, Mg retains TBN more than Ca because it doesn't neutralize all types of acids. Therefore, TAN rises more with Mg as well. So, it's not necessarily a good thing, as the difference of TBN from TAN won't shrink any slower.

Regarding smoother cold start, I don't know if Castrol has lower CCS/MRV than Mobil 1. If that's the case, it could be smoother in extremely cold starts.
 
Originally Posted By: Gokhan
Regarding titanium, some VOAs I saw didn't show any for some reason, even though the package says fluid strength. I don't think it says titanium (says only fluid strength).

Current bottles say 'titanium'...

2014-11-02142938.jpg
 
Originally Posted By: Quattro Pete
Originally Posted By: Gokhan
Regarding titanium, some VOAs I saw didn't show any for some reason, even though the package says fluid strength. I don't think it says titanium (says only fluid strength).

Current bottles say 'titanium'...

OK, thanks, it should have Ti then. I wonder if it has Mo. For some reason, the VOA posted here (link) doesn't show any Ti.
 
Originally Posted By: edyvw
Originally Posted By: OVERKILL
Originally Posted By: edyvw
Originally Posted By: Gokhan
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.

Mobil 1 0W-40 SN (US-made): Trinuclear moly, no titanium, no undesirable magnesium, much higher TBN, much higher VI.

Some people claim that Castrol is smoother. Is it smoother to drink? I don't know why an engine would run smoother at cold starts with an oil that is thicker when cold (has lower VI) and has less friction modifiers.

Castrol has Titanium, and as far as I know it is Full-SAPS oil, same as M1, so it has pretty much same TBN, except M1 does not have that good TBN retention.


It has had great TBN retention in the applications I've run it in
21.gif


Mine dropped to 2.7 in 5K on first UOA, second was 2.3 after 5K.


Mine was 7 after 6,200 miles (10,000km), and that was in the fuel diluting M5.
 
Originally Posted By: Gokhan
Regarding TBN retention, Mg retains TBN more than Ca because it doesn't neutralize all types of acids. Therefore, TAN rises more with Mg as well. So, it's not necessarily a good thing, as the difference of TBN from TAN won't shrink any slower.

Again, what really matters is the difference of the TBN from TAN. If TAN exceeds TBN, you don't have much protection. With Mg, TBN doesn't drop as fast but TAN rises faster, as Mg detergent doesn't neutralize certain acids. Therefore, you don't really get better protection as the TAN may have gone over TBN.
 
Quote:
Mine was 7 after 6,200 miles (10,000km), and that was in the fuel diluting M5.

I believe you. My driving is 70% HWY, in UOA there was less then 0.5% fuel in oil. I drive it to the maximum, especially in mountains.
Not sure is there difference in fuel inCanada and the U.S. when it comes to sulphur.
 
Originally Posted By: Gokhan
Castrol 0W-40 SN (German-made): No moly, no titanium, yes undesirable magnesium, much lower TBN, much lower VI.

Mobil 1 0W-40 SN (US-made): Trinuclear moly, no titanium, no undesirable magnesium, much higher TBN, much higher VI.....


I can't find any PQIA VOA results for magnesium (or anything) in the 0-40 synthetics. Mobil and Castrol don't list individual elements in them either. But their 5w-30's both have considerable Mg (700-1400 ppm). Is the 0w-40 formulation that much different? If the Mg is that undesirable, why so much of it in the Castrol/Mobil 1 syn 5w-30's while the other 22 PQIA tested brands don't use it? This is confusing. I'm considering switching from 5w-30 to 0w-40 so this is applicable.


5w-30 syn comparisons PQIA
 
OK. Found earlier PDS links on the 0w-40's. Surprised at the big difference in Magnesium and TBN vs. the 5w-30's. Another reason to switch to the 0w-40 M1 (besides the much improved HTHS from 3.1 to 3.8).
 
Originally Posted By: 69GTX
OK. Found earlier PDS links on the 0w-40's. Surprised at the big difference in Magnesium and TBN vs. the 5w-30's. Another reason to switch to the 0w-40 M1 (besides the much improved HTHS from 3.1 to 3.8).

Well of course it has high HTSH, it is Euro oil. All ACEA A3/B3 B4 must have HTHS above 3.5.
 
Originally Posted By: edyvw
Well of course it has high HTSH, it is Euro oil. All ACEA A3/B3 B4 must have HTHS above 3.5.


True. But the car was spec'd for 3.1 HTHS (5w-30). What I didn't know was that the magnesium was nearly all removed in the 0w-40 M1 version. Don't know Mg is "bad" it's used in the 5w-30 Castrol/M1. What is clear is that they both cut down on the Ca and beef up the difference with Mg. They wouldn't do it if it didn't work/make sense. A few of the boutique 5w-30 syns include 460-480 ppm Na (Valvoline included). Not sure why. If you add up the Ca, Mg, and Na, Mobil 1 5w-30 comes out a lot lower than all the other syn brands. If M1 removed approx 760 ppm Mg from the 5w-30 to 0w-40, then they must have upped the Ca by a similar amount.
 
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