I can't speak for the mobile brand, but I use the Amsoil 0-30 in all of my gas burners. I used to use it in a heavy conversion van that I took through death vally in the summer (125 deg f outside, no pressure loss, no problems)
And I have a customer who runs it in a mid '90's dodge conversion van that hauls an old airstream around all of the time.
Wuth synthetics, that low number is not the warning flag for warm weather that it is with dino oil,however it is more likely to find your leaks if you have them
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-------Robert, '93 940t, '90 240 wagon, '84 240 diesel (she's sick) , '80 245 diesel