Getting ready to buy some Amsoil. Was reading up on the specs and I found that the XL-7500 5w-20 conforms to the specs: FORD WSS-M2C153-H. Which is what Ford states in the owners manual as the specification to adhere to. The Series 2000 0w-30 that you use conforms to the specs: FORD ESE M2C-153G. What is the difference in the specs? And why do you use the Series 2000?? From what I can understand from the charts, the 2000 is better oil, but is it worth 50% more, because that's what the price reflects?? I like to change my oil every 3000 miles so I'm not sure that the Series 2000 is worth the extra money. Or is it really ok to change the oil less frequently if one is using the Series 2000 amsoil??? If anyone can answer these question, you can. Thanks in advance.
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