Is this right?

I am still looking into this but I noticed somewhere that their Truck and SUV oil is actually 10W30 now.

Has something changed?

http://www.mobiloil.com/usa-english/motoroil/car_care/which_oil/WhichOilManualResults.aspx?option=2

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1993 W124 300D
-297K on the clock as I type this.