推荐回答（5个）
HX5和6是黄喜力，也叫黄壳，HX5是壳牌矿物质油的最高级别。
HX6属于半合成机油，当然是半合成中级别最低的。HX7是蓝壳，常见的轿车用油，是壳牌机油半合成中级别最高的。
壳牌喜力HX7适用于采用曲轴箱通风装置和催化转化器的电喷式汽油发动机；采用曲轴箱通风装置的涡轮增压中冷式直喷柴油发动机。
此类引擎通常在极端温度下运行，并且可能换油周期更长，这会对引擎造成很大压力，导致引擎灵敏度降低。
壳牌喜力HX7含有独特的动力清洁分散技术。与传统润滑油相比，它可持久防止油泥积碳的生成。更有效保护引擎，令驾驶更顺畅灵敏。
壳牌喜力HX6合成技术润滑油使用独特的动力清洁技术，帮助引擎更有效的运转.有助于防止油泥和磨损，有助于延长引擎寿命，在整个换油期提供保护，适用于汽油、柴油和天然气引擎；也适用于生物柴油和汽油/乙醇混合燃料。
优异的氧化稳定性，长效保护引擎。最大程度减振降噪，令驾驶更加宁静顺畅。 它特别适用于高性能的现代汽油引擎，即装配有催化转换器的燃油喷射式引擎。适用于曲轴箱强制通风燃油喷射发动机，适用于曲轴箱强制通风燃油喷射发动机及催化转化装置的车辆。
壳牌喜力hx5机油采用独特的清洁技术。壳牌喜力hx5机油与普通机油相比更能持续抑制灰尘及油泥的积聚并降低发动机噪音。
壳牌喜力HX6合成技术润滑油使用寿命比普通矿物油提高了24%，剪切稳定性提高了34%，清除油泥的效率约是普通矿物油的2倍，如此高的性能，却有着和普通矿物油一样的低廉价格。
作为合成技术的壳牌黄壳HX6的确在各项性能方面均优于HX5，无论是使用寿命，保护性，情节性，抗高温和低温方面均全面优于HX5，是一款值得推荐的油品。
X5是完全的矿物质油，就是尾油提炼，沥青、石蜡，和其他很多成分组成
X6是半合成油，其实就是矿物质油+三类氢异构基础油，加氢油的比重很少
大部分仍是矿物质油
本质上的差距不大，X6所谓的半合成，多半是个噱头
壳牌的黄喜力为HX5，它是多级润滑油，清洁保护，宁静顺畅，HX6 为四S店专用的，区别不会很大，市面上大部分为HX5,只有北京和较大的城市会有HX6出现，大部分中档的车加HX5足以了，而且比HX6便宜！有全合成油和半合成油，还有矿物油。汽机油还有级别的分类，按API分SN SM SL SJ SG，SN是新出的，最高级
HX5是SM级别的矿物油,HX6是半合成的SM/CF的柴油机汽油机通用的。
HX5是SM级别的矿物油，HX6是半合成的SM/CF的柴油机汽油机通用的。
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