Low oil pressure from 5w-30 mobil 1
09-06-2010, 11:00 PM
#21
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No, there is a difference in viscosity(thickness), and with the 10W30, it will stick to your bearings better and that extra thickness helps out especially when your motor is running warmer. and all that B.S. about losing power with thicker oil is dumb, unless your running straight 30W oil you will not tell the difference.
09-07-2010, 08:33 AM
#23
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The tech sheet from Mobil 1 shows the formulation has changed for 5w30. The viscosity at operating temp is now 11.3. The other grades of Xw30 except for the High Mileage blends are still showing a viscosity of 10 at operating temp. 5w30 is now the thickest multigrade 30 weight oil they make at operating temp for the regular Mobil 1 line. I think it is arguably a much better oil and plan to switch back to it. I just bought some at Walmart and plan to see if I have a better experience with it now, because the valvetrain used to be much louder when it was used instead of the German Castrol. Now the operating temp viscosity of these oils are very close to each other, but the GC is still slightly thicker.
