1996 Lincoln Town Car 65,000 miles. The car runs beautiful. Yet was pinging going up hills, when flooring it and even 3/4 throttle downshifts on the highway sometimes caused it. Completely goes away on Premium Shell or BP. So I took off the MAF sensor and cleaned it with electrical cleaning fluid. Of course never touching the element. Let it dry, reinstalled it and added a full bottle of Gumout Regane to about 15 gallons of BP regular. It's only been about 50 miles and the pinging has reduced quite a bit. However, under full throttle acceleration the pinging is still really heavy. I want to eliminate it completely. Should I consider adding Regane to less fuel, maybe just 10 gallons or even less, to concentrate the cleaning effects? Can that damage anything? Can a few tanks in a row be run that way safely? I read somewhere that Mopar Combustion Chamber Cleaner can be used to remove carbon that is difficult to combat with additives. Anyone ever do a deep cleaning with a product like this?