You will get Kroger fuel points as you complete the online customer feedback survey. At the end of the survey, an amount of 50 fuel points will be rewarded which you can redeem on Kroger fuel station. Also, you can use your plus card at shell fuel station to redeem the points.
You can track the point you have accumulated and how many of them you have used. This is a good option as you are aware of the remaining ones in your card.