Cone style suregrip synthetic gear lube.

Do you guys run synthetic gear lube in your cone style suregrips? I installed a 355 that has been sitting in a bucket for years. I used Valvoline synthetic gear lube and Red line friction additive. I only drove it about 5 miles but it is chattering going around the corners. Maybe it just needs drivin for awhile. What are your guys thoughts?
I run conventional
The cones can be touchy especially with mileage and not grab all the time