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Originally Posted by parawolf
The problems also exist in how random is the piston/cylinder shutdown? Do they always shutdown the same cylinders? If so then there is going to be heat issues without a doubt. Other reasons why they don't get such a massive saving in petrol is that they still have to spray petrol (smaller amounts given) into the cylinder to ensure lubrication.
I have my concerns about this being a silver bullet. A better designed engine to match with what the user is going to do with the car vs using a 'catch-all' engine design in a RWD sports car, to a 4WD, to a FWD.
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Yes, lubricating a dead cylinder would require a bit of fuel, aso combustion pressure helps hold the rings in place to reduce oil consumption... too many potential issues for my liking..
Does anyone remember ELB (extra lean burn) in the chryslers? with the lights on the front guards and vaccuum guage on the dash?? it was a failure because it leaned out cylinders and caused detonation and over heat issues..