↑上圖為米羅精緻汽車美容代理之英國SHAMPER海藻提煉中性泡沫洗車精與德國100%純天然草本提煉中性洗車精

許多愛車族洗車會使用家庭用洗碗精，當作洗車精使用，洗車效果通常不錯，洗車後金油層也非常滑順，殊不知自己的愛車已慢慢地受到洗碗精的傷害而不自知，請看以下文章為國外知名汽車美容雜誌發表，為何洗碗精不能作為洗車精代替品的七大理由。

原文摘錄自:Professional Carwashing & Detailing Magazine

Reason 1：Water softeners and water spots
Manufacturers of dishwashing detergents assume dishes will be hand dried, and many detergents do not contain water softeners that will prevent spotting. Using dishwashing detergents on an automobile increases the likelihood of water spotting. A car will look shiny and clean at first, but the spots will appear soon after, much to disappointment of the car owner. However, most carwashing products contain ingredients that soften the water, which helps in preventing water spotting.
理由1：為了讓碗盤用手摸起來乾燥，許多餐具洗滌劑製造商生產不含軟水劑的洗碗精。使用洗碗精洗車可能會增加水痕產生。使用洗碗精洗車初期會讓車子看起來乾淨有光澤，但不久之後許多車主失望，因為水痕逐漸產生。然而大部分專業洗車精含有軟水劑可防止水痕產生。

Reason 2：Grease cutters
Dishwashing detergents are generally made with certain surfaces which are designed for cutting and removal. However, these surfactants can strip off silicones and waxes on a vehicle，s surface. The surfactants will also strip any protection on bare metal parts of vehicle, such as the engine compartment or the areas inside the doors. This can promote rusting when the detergent finds its way into these areas. Just as well, any chipped spots on the paints are susceptible to corrosion. The end results are a dull, unprotected finish and the possibility of corrosion in undetected places. Carwah shampoos are formulated with surfactants that are gentler to the car，s surface in that they do not strip the car of wax or sealant protectants applied to maintain a glossy and protected finish.
理由2：洗碗精通常含有專門用來去汙的界面活性劑，然而這些界面活性劑會將車身上的有機矽與蠟剝離。除此之外界面活性劑也會將引擎室與車門內的金屬裸露部分產生腐蝕（國科會研究報告中有提到界面活性劑對酸性藥物在金屬氧化表面吸附行為影響），同樣的漆面上有任何因油漆剝落產生板件金屬裸露部分亦會造成腐蝕。最終結果導致光潔度下降以及肉眼看不見的地方可能產生腐蝕。專業的洗車精添加溫和的界面活性劑配方不會去除車蠟與封膜保護劑，可以保持車身光澤度與保護車身。

Reason 3：Emollients
Dishwashing detergents often contain cosmetic chemicals or emollients to keep hands soft and prevent the cracking and drying that can occur when immersed in water for too long. It，s nice for the skin , but not as nice for the car. These emollients will make a vehicle finish difficult to dry and/or leave it with a smeary appearance and dull finish. Carwash shampoos do not contain emollients or anything that would be a cosmetic “perk.”
理由3：洗碗精為防止手部皮膚長時間浸泡在水中，導致皮膚乾燥裂開，通常在製作過程中會添加含有化妝品成分的化學藥劑或是添加具有潤膚成分配方。這些成分對皮膚很好，但是對車子來說這些潤膚成分難以乾燥去除油汙，並使得車漆失去光澤。專業的洗車精不添加任何潤膚劑與化妝品等“額外成分” 。

Reason 4：Surfactants
The surfactants added in carwash shampoos give a thicker, stronger appearance to the product, since “no foam”is often misconstrued as a weak shampoo. However, the surfactants used in carwash shampoos are not the same as surfactants used in dishwashing detergent and will rinse easier.
理由4：專業洗車精所添加較溫和的界面活性劑，因為不會產生大量泡沫，因此常被許多人誤解洗淨能力較差。然而專業洗車精所含的界面活性劑沖洗更容易不同於洗碗精中的界面活性劑。

Reason 5：Dirt removal
For the most part, the surfactants used in dishwashing detergents are not the same as those used in carwash shampoos, as mentioned above. Surfactants used to remove food residue and grease from pots, pans and plates are not the most effective surfactants to remove dirt and oil film from a vehicle. The surfactants used in dishwashing detergents can leave dirt and oil film behind, causing you to work harder having to wash the vehicle more than once. The surfactants used in carwash shampoos are specially formulated to remove both dirt and oil film.
理由5：在大部分情況下，洗碗精所使用的界面活性劑不同於洗車精，洗碗精的界面活性劑主要針對食物殘渣，以及鍋碗瓢盆上的油汙進行去除，但對車子表面上的汙垢與油膜卻不是最有效的。

Reason 6：Additives
Dishwashing detergents contain no special additives. However, well- formulated carwash shampoos contain special additives that provide benefits for hand carwashing. For example, a small amount of high pH additive helps to more effectively remove the dirt and road film and to neutralize any acid rain spots that are on the vehicle. These additives are not contained in dishwashing detergents.
理由6：洗碗精無特殊添加劑成分，然而精心調配的洗車精含有特殊配方可提供許多優點。例如少量的高pH質添加劑，可有效去除汙垢並中和落於車漆表面上的酸雨。洗碗精中是不含這些特殊添加劑。

Reason 7：Table salt
Sodium chloride （table salt）is commonly used as a thickening agent in dishwashing detergents to give them the appearance of a quality product. Washing a car with dishwashing detergent is literally like using salt water. This can result in severe water spotting and promotion of corrosion.
理由7：洗碗精為了增加濃稠度，常添加氯化鈉（食鹽），因為氯化鈉為便宜的增稠劑。用洗碗精洗車等於是用食鹽水洗車，結果就是導致嚴重的水痕與車身腐蝕。

最後再次強調不論是濃縮洗車精或是洗碗精，並不代表它一定是濃稠狀，因為只要添加增稠劑就會很濃稠，泡沫多也不一定代表洗淨力強，因為只要添加發泡劑泡沫就會很多，泡沫只是讓潤滑車身，去汙力是有限的，絕大部分洗車精都是鹼性因為車漆汙染都是酸性居多，所以會利用酸鹼中和達到快速清潔效果，但鹼性洗車精長期使用會造成金油層傷害。

（服務項目：汽車鍍膜，機車鍍膜，重機鍍膜，玻璃鍍膜，新車鍍膜，結晶型鍍膜，消光漆鍍膜，XPEL，XPEL漆面保護膜，XPEL隔熱紙，XPEL車身保護膜）