volvo drive oil

[doesitfloat?]

This is my first volvo drive and I don't have any Volvo recommended oil on hand. I'm about a 1/2" low on the dip stick. They recommend "Volvo GL5 synthetic".
Anyone know of a comparable weight/brand that I can buy at a local store tonight since all of the marine shops are closed?
Thanks for any help.

[old school daycruiser]

Valvoline synthetic GL5, napa usually has it. However, I drained and filled mine with redline heavyweight shock proof, and it just seems better. I actually make sure it is right at the tip top of the mark when cold too. :)