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Mobil 15-50 Useable Temperature Range...


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We use our '98 Boxster mostly in good weather, ie above 32F. I have Mobil1 15-50 Extended Performance oil in it for track use, things get really hot in Colorado in the summer. I usually change to Mobil 1 0-40 for the winter. But since the car only has about 3K miles on this oil change I'm wondering about leaving the oil in and being sure to not start it if the temperature sensor is below 32F. Anyone know the usalbe temperature range for 15-50?

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The owner's manual we have for our MY04 996 suggests the low temp cut off for synthetic 15W50 is 50F.

The ASTM pour point for Mobil1 15W50 is minus 42C.

The ASTM pour point for Mobil1 0W40 is minus 54C.

You can find the spec sheets for all Mobil1 oils at www.mobil1.com

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