ok well he is puting 10 bucks in but he can drive all day on 10 bucks as far as distance, three to four miles min - 12-14 miles max. he filles up i nthe morning usually before work so it sits for about 5-6 hours and there is no out side leak no moisture coming from the hoses or anything on the ground. nothin! the car has just had be serviced three months ago and everything is new in the engine bay except for the block.