I do not think that you can use mineral oil for DNA extraction from paraffin embedded tissue. I think you could try a DNA extraction kit from Thermofisher: http://www.thermofisher.com/order/catalog/product/A31881 or Qiagen.
Well, there are articles which shows the use of mineral oil in the extraction of high quality DNA. They have used mineral oil mainly for the deparaffinization step and then followed either kit based or manual methods. Even I have been trying to standardize a method of DNA extraction from FFPE blocks/Slides but I haven't been able to get any amplify-able DNA. I too have used mineral oil and the experiment is still ongoing. You can go ahead and try. Good luck!