I got a 2004 3.9L auto and was wondering what the changes were between mine and 3.8L. If I am right 3.9L is the volume of oil that runs through the engine. If there's 3.9L in one that means I got .1L more running through mine than the 3.8L meaning it's bigger, doesn't it. I really don't know and that's why I'm writing, see if someone can correct me.
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Most say there's no difference in performance, but I wonder why wouldn't there be if engine is bigger.
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