Scotty, I have a 99 Caravan 3.3L motor. I change the oil every 5k miles. I use the low cost SuperTech oil\filter from Walmart. Can I just keep doing this or do you think its time I spend double the price for the fancy Mobile one full synthetic high mileage formula? I think oil is oil and if it is changed often, it doesn't matter the brand. What do you think?

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if you change it every 5, the cheap filter is fine. you are correct