We use a similar syringe for getting the gear oil back into that tiny hole (which they put on the side - hello, gravity here people). There are a bunch of different sizes at farm supply stores, if you have any around your area. Of course, the conversation with the sales people is always interesting:
"So what size syringe are you after, and are you using this for a horse, a sheep, a goat?"
"No, I need it for a Kymco, to change gear oil. I need about 6 ounces."
"What's a Kymco, is that a type of sheep? I've never heard of it. And why are you giving it gear oil? Don't you know that will kill it?"
"No, it's okay, she really likes it. We do this every year."
"Oh, so it's a ewe."
"Dear Lord......"