As long as it's clean, that'll be fine- especially as it's warm out ATM, the viscosity goes down a bit.
For the past 7 years I've used clean mineral oil. That's been my only requirement- current engine has just passed 100K in my ownership, 70-80K of which was in the last three years. This was on the bug, on the camper I've gone 12 miles and had to replace a cylinder head after the first 4. Good times.
Just make sure it's got clean oil, and enough of it.