Using a 3mL or 1mL syringe with detachable needles makes it much more difficult to draw and inject with a 27g. It has to do with the plunger diameter, as opposed to an insulin syringe where the plunger is much smaller in diameter.
Basically, the smaller plunger allows more pressure to be exerted on the oil with the same amount of force exerted by your muscles. Using a 27g 1/2inch insulin syringe like this http://www.otcwholesale.com/easytouch-75501.html I can draw .3mL in 15 seconds. I actually counted yesterday.
I tried once with a 3mL luer lock syringe and 27g needle. It was practically impossible to press the plunger down with all the force in my hand. Give it a shot, pun intended 
