OK... just kidding! I got your attention though!
Anyway... I had the intake off of my 90k mile 5.0 Ford this weekend. I bought the car with 39k miles on the odometer. I have no idea what was used before I bought it, but I would guess dino. I started off using Mobil Drive Clean Blend. I'll have to check my records, but I seem to recall using Mobil Drive Clean dino for at least one oil change when the store was out of blend.
At 60k miles, I switched to Chevron Havoline. At 62k miles, I did an AutoRx treatment, and continued with the Havoline. At 74k miles, I switched to Pennzoil, and began using a 3oz maintenance dose at every oil change. I stopped this practice at the last oil change, since I ran out of Rx.
All OCIs were between 3000-4600 miles, with the longer intervals happening recently with the Pennzoil. All oils were 10W-30. I pleasently surprised at how clean the engine was when I pulled it apart. Check it out:
90k mile engine
![[Big Grin]](images/icons/grin.gif)