Twinky StinkyYou can change your route setting to only have certain types of stars (fuel stars). In doing this almost every jump will be a fuel star. But then again if people knew how to do this the rats would be out of a job, unless your the type trying to make a 10+ jump with no scoop.
If you do that, you won't stumble on all the gems tho. The current route plotting will ensure it always routes you to a fuel star when you're about to run out, you just have to pay enough attention to refill there.