The simple answer is yes. Years ago, many motorists believed that once you switched to synthetic, you could never go back. That is not true. Oil manufacturers create synthetic blends that mix the two. They are not incompatible. If you choose to use synthetic oil and decide later that you want to return to conventional oil, you are free to do so.
Another common misconception is that synthetic oil will ruin your engine and cause leaks. This is borne out of a condition with some older engines where, over time, oil caked up and filled gaps in areas where engine seals had begun to leak. If an old engine has leaks that were stopped up by oil residue, the advanced cleaning power of synthetic oil can clean out the gaps and “cause” (reveal) a leak. But synthetic oil will not create a leak where one did not already exist.