What do I need to do to use oil base exterior paint? I will be painting over latex exterior paint.

Paint 3 bedroom, 1 and 1/2 bath townhome, 1100 sq. ft, doors and trim. Cabinets in kitchen and bathroom are not to be painted. Bedrooms are approximately 10 X 11. Sheetrock needs to be repaired in 4 areas, (3) 4X4 & (1) 2×2.