Originally Posted By: miniac007
The second point is the pourpoint. The 80w90 have a -27/-30° pourpour which I think could be borderline... That is why I would prefer a 75W with lower pourpoint.
I think you have a very valid point with 75W here, though I'd personally not concern with.
Please note it's the lowest ambient temperature you actually 'work' on the differential that matters, not contemporary ambient temperature per se.
Originally Posted By: miniac007
So the solution should be a 75w140 ? What do you think about it ?
http://www.q8oils.co.uk/downloads_temp/b34386a9-341f-417b-9e22-c3c34016f24c.PDF
or
http://www.rgracing-oils.co.uk/TDS/Trans/Syntrax Limited Slip 75W-140.pdf
But the price rise from 5€/liter to 10€/liter ...
In the 5€ range, I can have 100 cst at 40°C with this one:
Pennasol 75w-90 GL-5
So I wonder if it worth switching to a 75w140 for the double of the price...
Both the 75W140's quoted appear a tad too thick for winter operation, it's summer operation would be nice.
Now , the Pennasol 75W90 of KV@40*C of 99.2 cSt would be far better than the Addinol of KV@40*C of 89.2 cSt, for differential components wear protection.
If you may, try work towards a 75W110 of KV@40*C 135 cSt or a 75W90 of KV@40*C of 110 cSt.
https://www.amsoil.com/lit/databulletins/g2043.pdf
Pl bear in mind, it's the appropriate KV@40*C that influences your differential protection , base oils and additives system being equal.
JHMO
The second point is the pourpoint. The 80w90 have a -27/-30° pourpour which I think could be borderline... That is why I would prefer a 75W with lower pourpoint.
I think you have a very valid point with 75W here, though I'd personally not concern with.
Please note it's the lowest ambient temperature you actually 'work' on the differential that matters, not contemporary ambient temperature per se.
Originally Posted By: miniac007
So the solution should be a 75w140 ? What do you think about it ?
http://www.q8oils.co.uk/downloads_temp/b34386a9-341f-417b-9e22-c3c34016f24c.PDF
or
http://www.rgracing-oils.co.uk/TDS/Trans/Syntrax Limited Slip 75W-140.pdf
But the price rise from 5€/liter to 10€/liter ...
In the 5€ range, I can have 100 cst at 40°C with this one:
Pennasol 75w-90 GL-5
So I wonder if it worth switching to a 75w140 for the double of the price...
Both the 75W140's quoted appear a tad too thick for winter operation, it's summer operation would be nice.
Now , the Pennasol 75W90 of KV@40*C of 99.2 cSt would be far better than the Addinol of KV@40*C of 89.2 cSt, for differential components wear protection.
If you may, try work towards a 75W110 of KV@40*C 135 cSt or a 75W90 of KV@40*C of 110 cSt.
https://www.amsoil.com/lit/databulletins/g2043.pdf
Pl bear in mind, it's the appropriate KV@40*C that influences your differential protection , base oils and additives system being equal.
JHMO
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