基本上按照API的規範來看~~推測這隻5W30並非運輸用車輛使用產品~~

可能泰國是輕卡(pick-up)的生產大國~~

而這產品應該是for符合後期較新生產的輕卡車在使用~~

以自家產品的泰國網頁來看~~

http://www.shell.com/home/content2/...ula_0317.html#0

大部份的柴油重卡還是以15w40為主~~

10w40的產品是for新規的4期車輛在使用~~


若拿小車的產品

泰國helix產品一覽

Shell Helix 40 Passenger car motor oil for gasoline engines 001A9182
Shell Helix Diesel 20W-50 Passenger car motor oil for Diesel engines 001B0310
Shell Helix Diesel 20W-50 Passenger Car Motor Oil for Diesel Engines 001B2332
Shell Helix Diesel Plus 10W-30 Passenger Car Motor Oil for Diesel Engines 001B1631
Shell Helix Diesel Super 15W-40 Passenger car motor oil for Diesel engines 001AN032
Shell Helix Diesel Ultra 5W-40 Passenger car motor oil for Diesel engines 001A0251
Shell Helix Plus 10W-40 Passenger car motor oil for gasoline engines 001A9898
Shell Helix Super 10W-30 Passenger car motor oil for gasoline engines 001A9854
Shell Helix Super 10W-30 Passenger car motor oil for gasoline engines 001A9902
Shell Helix Super 20W-50 Passenger car motor oil for gasoline engines 001A9910
Shell Helix Ultra 5W-40 Passenger car motor oil for gasoline engines 001A9013
Shell Helix Ultra AB 5W-30 OEM specific Passenger car motor oil 001A9855
Shell Helix Ultra Racing 10W-60 Passenger car motor oil for gasoline engines 901L3254


也是有高達10w60的產品~~

所以不才認為~~除非是較新式車輛~~否則稍微高一點黏度的產品還是有其大宗市場需要~~