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post #1 of 1 (permalink) Old 09-08-03, 05:14 AM Thread Starter
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Which engine oil for Mustang?

It's time for changing the engine oil for my 97 GT. It will be my first change, the previous owner was using Castrol Magnetic.

I was planning to use either Castrol SLX or Mobile-1. After searching over the Internet I found AMSOIL. In AMSOIL pages I also found some information about additives such as double-up, which they say that the performance of those additives has not proven yet.

I kindly ask you if there is a neutral web page to compare the oils and these additives? I still have problems about those 20W-50 numbers, has anyone know a content to learn about oil?

Would you also recommend to use any additives in the engine such as double-up? Do you recommend Castrol SLX? What should be the period of changing the Castrol SLX and oil filter. Do you think it's worth to go with AMSOIL? Any ideas?

Many thanks in advance.

97 Mustang GT Coupe

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