Never used Lucas. I have used Techron since my Saturn was new in '92. I run a bottle through the Crossfire once a year when I fill up for a big trip, like CAA coming up.

I had some minor issues with my Saturn and the dealer showed me a letter that recommended Techron, twice a year, at twice the rate the bottle showed. One bottle with a half tank (7 gal), instead of full tank (12-14gal).

James