Threshhold limit for gst registration as a petrol pump owner

Yes, turnover of petroleum products will be included in computing the threshold limit. Section 22 states that liability to get registered arises when AGGREGATE TURNOVER exceeds the specified limit. As per Section 2(6) aggregate turnover includes exempt supplies and definition of exempt supply as per Section 2(47) includes non-taxable supplies which consists of petroleum products which concludes that supply of petroleum products along with lubricant supply shall be considered for the threshold limit.