User blog comment:Shinhwalee/Guide to Power Leveling Heavy Cruiser (CA) in World 3-2A/@comment-3502824-20150322071953/@comment-3502824-20150421115554

Well, you don't exactly need to use CVs and can use CVLs instead. It's about 50fuel/60ammo per run and I do it all the time. Even yesterday (training Myoukou)