Thought you might be interested. This is for Mobil 1
Viscosity Curve
- Thread starter Al
- Start date
Not very curvaceous.
No, but as I mentioned before, you go up a grade and you buy yourself 10°C of headroom on the viscosity front. This is 2 grades and 20°C extra headroom.
dnewton3
Staff member
Logarithmic chart?
That's a bit thinner than most of the 20 weight tests I've seen.
Which 40 weight is it?
To me it looks like the w is cut off.
Which 40 weight is it?
To me it looks like the w is cut off.
Both Mobil 1 FS 5W-40 and 0W-20 EP High Mileage
Yes Log. You just draw a straight line between 100C and 200C. Values should be accurate down to 0C (32F)
MolaKule
Staff member
If those data were plotted on non-log paper, the results would be very curvaceous.
Al, thank you for this graph!Thought you might be interested. This is for Mobil 1
This is interesting to me in a place with cold winters - presuming the oil temperature lags the coolant temperature by a few minutes, during a typical drive in town during the winter, the 0W-20 would get no thinner (13.7 cSt) than a 5W-40 would at operating temperature in the summer.
Therefore, I would feel fine running a 0W-20 in winter, even if 5W-30 is called for.
That’s kinda been the going idea for awhile now… I’ve seriously thought about running a high HT/HS 5w20 in my EJ253 which calls for a 30 grade in our Midwest winters… which hover in highs in the mid-teens and lows in the negative single digits… combined with snow and idiots I’m never pushing it to its limits. I’d feel comfortable with the No VII 5/10w20 in it.
I thought so too, but was advised by the dealer to not to run a 0W-20 where a 5W-20 had been specified.
This was a 2009 Mazda 5 with a 2.3 litre DOHC.
I went full rebel and did it anyway. That was 11 years ago. The engine still runs flawlessly.
I usually run a 5W-30 spring and summer.
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