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It is a dodge not a gm.
also, running the engine on lean will cause the valve seats to to burn. I have been a auto mechanic for years, but got out of its mostly. Shutting off the injector on one or two cylinders while in cruise is a good idea. Sure, it will send more unburnd oxygen to the O2 sensor, so some form of modifying the input of the sensor to the ECM would have to happen. Taking in Map sensor values, TPS sensor values so when to shut off and turn on the injectors so to prevent engine shake is something to be considered. A trailer that matched the exact outside width and height of the rear side of the caravan and taper to a boat take would cut drag considerably.
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