Hello all. I have been using engine oil additives like Slick 50, Lucas Oil in my other cars over the years. A few questions:

1)Does anyone else use any of these types of oil additives in their Crossfire?

2)Are they safe/recommended to use in the Crossfire Engine?

3)If so, what brand is the best? Slick 50? Lucas Oil? Others?

Any feedback would be appreciated.

Thank you