Join Date: Mar 2010
Location: Mobile, AL
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In my personal opinion, and being a mechanic, your K&N filter will be fine for now so you can save that bit of money and do other things.
You absolutely most positively MUST NOT do ANYTHING ELSE until you get the crap ford gold coolant out. This is the number 1 killer of these engines.
1. Buy some good quality diesel Extended Life Coolant (ELC for short) and buy a ton of distilled water. Also buy some silicate cleaner. There are TONS of threads on this but this is VERY important. Not doing this can lead to BIG MONEY down the road.
2. After the flush and fill, THEN add the coolant filter.
3. I've shown and have seen NUMEROUS oil analysis reports that will allow you to run a good distance on oil, and the best oils for these engines are 10w and 5w oils. I personally use 10w-30 and have been advised I can run up to 10k miles, though I will probably never go more than 7,500.
After you kill the coolant issues, pick and choose what you want to do. But PLEASE get that coolant out. It cost me about $50 to change out my coolant and a few hours of work. Really worth it considering one headgasket change on these trucks can run over 3,000 dollars and take days on end.