I tend to agree with the following sentiments:
1. Why carry oil - it is everywhere particularly with the grades used by the R12. Even if you're running 15W-50 ynthetic, dropping half a quart of 5W30 mineral isn't gonna do you any harm if that's all you have available. Buy a new bottle, use what you need, and leave the rest at any garage so they can use the rest.
2. If you do choose to carry oil, why switch containers from original? Unless the bottle gets crushed between your bike and a Hummer, it won't come open unless human error is involved.