No Makita/Dolmar chainsaw that I have ever owned or serviced has ever had a bar oiling problem unless the wrong bar was being used with the saw. One day I tried a bar for a Stihl 025 and that failed miserably. I switched to a Husqvarna 350 bar and that works perfectly. Perhaps the oiler hole on the bar you are using does not line up with the oiler slot on the saw's case.