DOLLAR英国租车的油箱加满条款到底什么意识？

白金合同要贵50刀左右。


关于汽油的条款是：

If not included in your prepaid rate, you will be charged for a full tank of petrol for an amount equal to self-service pump price, at the commencement of the rental. You should return the vehicle as empty as possible.


是不是，如果订车时不买包油，都要付一箱油钱？


在取车的地方付包油的钱，大概多少？