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Thank you to those who took the time to post actual helpful info! I really wanted to see if anyone had experienced the same thing I had and if it was just something I had done. I think there are a lot of good oils out there and many variables (including engine health) that determine your outcome...

For my Explorer I use 5w30 truck and suv and my truck I use 0w20 truck and suv. What do you mean when you say android 12 lube? I've thought about changing to a little thicker oil in my truck since I'm running boost now but I wasn't sure if I should!

I really appreciate all the information from everyone! I definitely agree on the cam phaser design flaw and they are known for having problems. It is strange the two oil changes back to back (with shorter intervals of course) had the noise on cold start but now has went a full 5,000 miles on...

Sorry also I've used the same WIX oil filter in the explorer and K&N oil filter in my truck!

Wow thank you for all the replies! I did order an oil analysis kit so I hope it will shed some light on what happened! I think I'll do my truck oil first since I haven't drained the Pennzoil ultra yet but now I'm scared to run it in my explorer! I do one with the Mobil 1 and post the results...

Hi I'm new to the forum and I just wanted to share my experience running Pennzoil platinum and Pennzoil ultra in my personal vehicles. I've run Moble 1 synthetic for many years and always felt confident doing so. I kept hearing people rave about pennzoil so I figured I would try it out! At first...