As many of you know, I avoid silicones (no need for that debate here) but I tried the CD2 Engine Detailer on my '94 Bronco last week.
It has 86,000 snow and rain miles, and after it got to be a few years old, I stopped rinsing under the hood regularly.
Anyhow, a dealer I work with was having an event and they wanted a Ford from each year they were in biz on display. My Bronco and Cobra were asked to appear. I HAD to do something with under the hood of the Bronco and had little time.
I sprayed the engine area with Simple Green...gently brushed areas and rinsed. Then, I sprayed the CD2 on and let it dry. Then ran the engine (per instructions to help dry) for a while. I did have to wipe a few areas that were still wet.
What a difference! It's certainly not perfect but the old girl got lots of compliments. It dried without being tacky and does not look like it was soaked in oil. Dirt does not seem to stick to it, and even after driving in the rain it still looks great.
So..to those that recommended CD2...they were right.
(I did remove the serpentine belt before spraying.)
I don;t have a before pic...but if anyone wants to see the after..I'll take one.