Initially the governor was not eligible to immediately succeed himself. It was not until 1966 that Oklahoma amended the state constitution to allow the governor to serve two consecutive terms.

How many terms can a governor serve in oklahoma? OK. Let's think. My stream of consciousness:
To answer this question, we should know that: It was not until 1966 that Oklahoma amended the state constitution to allow the governor to serve two consecutive terms. The answer is two consecutive terms.