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6.0l Vs 5.7l Vortec Vs 5.7 Tbi Milage ? Propane Conversion

oakman

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oakman

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What type of milage does the 6.0l get HWY /CITY

5.7l vortec HWY /CITY

5.7l TBI HWY/CITY

 

This is why I'm interested. I am looking into a propane injected engine;and would like to convert the most fuel effiecient of the 3 engines found in a 3/4 ton truck. I think it would be the 5.7l vortec over the 5.7 Tbi but how much more fuel efficient would this engine be ? Converting to duel fuel the cost is $3000 for 5.7 TBI and $5300 for 5.7 or 6.0l vortec (sequential fuel injection). I think the old TBI milage won't be to far off the 5.7 vortec and the conversion cost is quite less. Any ideas !

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