as far as lucas products go, I'm not sure, I never tried them so I can't speak much of them. Like you though, I've read and heard both sides of the story.
I'm not a big believer in oil additives, I think there a waste of money if you follow proper OCI's and use good oil and a filter.
Anyway, If you only run your truck hard occasionally, no engine issues etc... I don't see why you need it, yet I don't see why not either. If it were me, I'd just keep sticking with the motorcraft 5w20. Even at high RPM's the 5w20 will hold up well.
Besides with winter coming up, thinner is better. -Mike-
Daily Ride: 98 Ranger, 2.5 Auto, K&N CAI, Flow 40 exhaust, reg cab flareside, grey metallic, 235/70R15 Bridgestone A/T's
Other Ride: 05 Harley Electraglide, tc88, Screamin Eagle stage 1 kit. Chrome lowers, nastalgic bag guards, black cherry, 1965 Electraglide Emblems