High silicon in 99' Crown Vic 4.6L modular.

[Titan]

Originally Posted By: Fordiesel69
How would wear accelerate on the pistons? I always warm the engine 1-2 minutes and then drive easy even during the summer. I only go to WOT when it is completely up to temp and only to pass a car not just for the fun.

I gave up on mobil1. Was WAY TOO expensive around my town and did nothing to benefit me. I got a bunch of PP at AAP for only 2.84 per qt. Still have boxes and boxes of it left. My engine was spotless inside when I bought it because the state did 3 ~ 4k changes religiously. I want to keep it that way. I may go to 5k when the UOA goes back to normal.


PP in my 04 4.6 Modular runs well over 10,000 miles with no problems. But, they are highway miles....

 

[Fordiesel69]

Stupid question, could higher silicon indicate a slight bit of coolant in the oil or would blackstones equipment show a small percentage of antifreeze towards the bottom of the UOA if this was the case?

 

[johnicon]

When I had my 2001 Crown Vic, my silicon always read high as well, and I changed the oil (M1) every 7,500 - 12,000 miles. I never worried about the silicon as there was no corresponding increase in any wear metals. Never seemed to cause any problems...

 

[Titan]

My 4.6 modular did this bump in Silicon, I found I had forgotten to tighten a clamp on the air intake, and that solved the problem.