I would not worry about having to attend the funeral of the pickup diesel any time soon.
Yes, the new Ford Ecoboost and GM gen 5 V8's are direct injection, but they are still injecting fuel in the intake stroke and compressing a fuel / air mix. They cannot run the more efficient cylinder pressures of a diesel engine until they are compressing only air and adding the fuel at the start of the power stroke. As it is now, detonation of pre mixed fuel and air is the killer of really efficient cylinder pressures in a gas motor.
Until someone comes up with a way to inject gasoline at the top of the compression stroke so they can use diesel like compression ratios, they can never match the fuel efficiency of a DI diesel.
The Ford Ecoboost DI engine is on the road now, but only makes 20+ mpg at light loads.
Owners report that if you put it on the cruse control at 60 MPH, it will make 20-25 mpg, but put any load on it or drive 70+MPH and mpg is in the teens. When someone builds one with 17/1 CR and DI at TDC on the compression stroke, then we may see diesel like fuel economy out of a gas engine.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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