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Thanks – is there a relatively easy way to diagnose this? Of course I would like to do all the things @tcp71 mentioned, but I'm not sure I'll be able to get around to it in the next month

Thanks yes I have seen quite a few of Fordtechmakuloco videos and I ordered the melling high volume oil pump – we'll see when I get around to doing it that's another story. Today I did an oil change and new filter, with Penzoil Ultra platinum 5w30. I think I'll go to 0w40 next change but I...

Thanks for all the feedback. I guess I'm just trying to determine what my procedure should be before my oil change, or if I should just immediately change it now. My thinking was: 1. put a quart of HPL cleaner in 2. drive a couple hundred miles more 3. do an oil change (with another quart of...

1. Mobile 1 5w-20 full synthetic (can't remember if it's the high mileage version or not, I'd have to check) 2. Have been changing it every 5k approximately. However at this point I'm at around 6k and I haven't yet changed it 3. No actually have only had the truck since 180k (so I've put...

Hi all, new to the forum - good to be here. I have a 2008 F150 5.4 with 200k miles on it. It mostly drives fine but has an issue at hot idle where the there is a lot of knock, very rough, and sometimes even stalls out with "low oil pressure" warning. Only at hot idle, on cold idle there's no...