Make sure you use the "cleaners" on a regular basis (at oil change intervals) to keep the small pieces broken up. If you use it on a car that has never had it done in 20,000 miles you're most likely doing more harm than good. Big pieces of crud can break loose and clog filters/injectors/pressure regulators/etc.
Haven't tried boosters on the 3 liter, but may someday try 104 or higher octane if I decide to go to the track to drag again... God I miss the smell of 116 purple
