Dreadful 5W50

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May 10, 2015
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Brittany / Canada


Finally decided to use this oil today. Useless old 5W50...
Nice giant cans, felt like opening giant beers, very very nice! With a clever opening design, drained perfectly, no drip, I was actually impressed
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Notice the tachometer reading around 4500rpm on the box, which is probably the maximum this oil will take you
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Originally Posted By: Linctex
is NOT what I would call "dreadful"


It was just a joke, because it is very probably some gr III oil, loaded with VII to give a 50 grade (notice it's AB/B3, not A3/B4)
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Not good for piston ring cleanliness, apparently.

Actually it's Petronas + Selenia, not just Selenia, so it might not be that old! Petronas bought Selenia in 2008.

I'm totally fan of the can design!
 
Haha, very probably (it is supposed to start at 18,6 cSt @100°C)!
And I didn't even start the engine yet^^

Now the big question, will the engine be able to reach 4500rpm ???
 
Originally Posted By: Popsy


Now the big question, will the engine be able to reach 4500rpm ???


Of course it will. It will just use 20% more fuel doing so....
smile.gif
 
How old is that? i've never seen oil cans like that that resemble a 24oz can of beer.
 
Petronas Selenia range of PCMO's are of higher 'tougher' specs and quality than that of Petronas Malaysia PCMO's.
A3B4 is hard to come by, and C4 C5 spec'ed oils unavailable.
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I like the Syntium 7000 0W40 in both Mitsubishi
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I think this 5W50 was formulated before Petronas took over Selenia (Fiat lubricanti originalli). An uoa of this oil will surely be interesting!
 
Originally Posted By: Linctex
API SL
ACEA A3/B3

is NOT what I would call "dreadful"



You're making the assumption that this oil genuinely meets the requirements of SL/A3/B3. I suspect if you put this ACTUAL 15W50 oil through the tests you need to meet these specs, it would fall woefully short.

The reality is that no oil formulator does any actual test work in an all mineral or semi synthetic 15W50 because (a) it's a tiny volume grade which no one cares about and (b) because it's a horrible, VII-laden oil which is a complete pain in the backside!

The way you 'play the game' to qualify a 15W50 is to exploit the Viscosity Grade Read Across (VGRA) rules. You might pass the Sequence IIIG oxidation/deposits test as a tight 15W40 which then you can read to the 15W50 position. You might pass a 10W40 on the VG sludge test and read it to cover 15W50. You might pass the IVA wear test as a 10W30 to read up. My favourite was always the Cat 1MPC diesel test which you could pass as an ultra tight 10W30 and legitimately read-up to cover the 15W50 CF position (a complete joke but there it is!). The idea is to always pass the 'easy' test to cover the 'hard' position.

The ACEA positions were even worse! I once got a squint at the Peugeot TU5 test results of the biggest European test house sorted by viscosity grade. The number of actual 15W50 A3 level TU5 test passes could be counted on the fingers of one hand of a man whose hand had once had an unfortunate accident with a food blender! (BTW one of those kosher passes was mine).

Most 15W50 TU5 'passes' are read-across from 10W40 results and that's where the real fun & games really start. You're not supposed to know what The Competition are doing but there are always competitor presentations which 'fall off the back of a camel' for one's edification. And you find out that someone has 'passed' the TU5 to A3 with a full mineral 10W40 with a Noack of exactly 13% & 22 SSI VII and you KNOW ABSOLUTELY that it's a big fat lie! However, as it's considered bad form to bad mouth The Opposition you can't say diddly squat.

15W50s are bad news. Avoid!
 
Last edited:
Originally Posted By: SonofJoe
Originally Posted By: Linctex
API SL
ACEA A3/B3

is NOT what I would call "dreadful"



You're making the assumption that this oil genuinely meets the requirements of SL/A3/B3. I suspect if you put this ACTUAL 15W50 oil through the tests you need to meet these specs, it would fall woefully short.

The reality is that no oil formulator does any actual test work in an all mineral or semi synthetic 15W50 because (a) it's a tiny volume grade which no one cares about and (b) because it's a horrible, VII-laden oil which is a complete pain in the backside!

The way you 'play the game' to qualify a 15W50 is to exploit the Viscosity Grade Read Across (VGRA) rules. You might pass the Sequence IIIG oxidation/deposits test as a tight 15W40 which then you can read to the 15W50 position. You might pass a 10W40 on the VG sludge test and read it to cover 15W50. You might pass the IVA wear test as a 10W30 to read up. My favourite was always the Cat 1MPC diesel test which you could pass as an ultra tight 10W30 and legitimately read-up to cover the 15W50 CF position (a complete joke but there it is!). The idea is to always pass the 'easy' test to cover the 'hard' position.

The ACEA positions were even worse! I once got a squint at the Peugeot TU5 test results of the biggest European test house sorted by viscosity grade. The number of actual 15W50 A3 level TU5 test passes could be counted on the fingers of one hand of a man whose hand had once had an unfortunate accident with a food blender! (BTW one of those kosher passes was mine).

Most 15W50 TU5 'passes' are read-across from 10W40 results and that's where the real fun & games really start. You're not supposed to know what The Competition are doing but there are always competitor presentations which 'fall off the back of a camel' for one's edification. And you find out that someone has 'passed' the TU5 to A3 with a full mineral 10W40 with a Noack of exactly 13% & 22 SSI VII and you KNOW ABSOLUTELY that it's a big fat lie! However, as it's considered bad form to bad mouth The Opposition you can't say diddly squat.

15W50s are bad news. Avoid!



What about the full synthetic like M1 15w-50?
 
Originally Posted By: SilverFusion2010
What about the full synthetic like M1 15w-50?

Or M1 FS X2 5W-50? It's Porsche A40 approved... Still junk?
 
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