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Re: What type of oil in old cars?
Posted to Technical Discussion Forum on 3/4/2008 6 Replies

I will admit that I don't understand or try to keep up on all of the oil specs and/or updates. We use bulk Castrol GTX 5w-30 for most Domestics except for Ford where we use Motorcraft 5w-20.

According to their website, Castrol states that their GTX:

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