I disagree based on my 35 years and almost a million miles of driving turbo 4cyl cars as daily drivers.2. Now for the real question, why would you want an EB engine for city commuting where heavy traffic is a major factor? At a steady speed, yes, they do get better mpg, now change to where throttle is constantly being applied.....mpg drops like a lead weight. The other issue is carbon build up within the turbo's..... and this is a "maintenance item" per Ford......meaning when you get the bad news that the turbo's are "coked up"...you're looking at $1k+ (dealer) per turbo to remove, disassemble, clean and reinstall..... and let's not forget the extra heat buildup that turbo's produce and their ability to "cool" in stop/go heavy city traffic goes to "zip" or a fraction of what is needed.... meaning...forget the 5-10k mile oil changes...because the oil has had the "crap" beat out of it.
Hi dave...I should have clarified better....I disagree based on my 35 years and almost a million miles of driving turbo 4cyl cars as daily drivers.
1. In city driving you seldom get into boost so the engine will get mileage equivalent to a NA engine of the same displacement. If you are someone that drivers idle to WOT constantly your mileage will tank but it will with a NA engine to and that is an issue with your driving style not the engine configuration.
2. Carbon build up and coking in turbos stopped being an issue 40 years ago when they started using turbos with water cooled bearing housings.
3. In city driving you are seldom in boost so the turbo is not generating any more heat than the exhaust of a NA engine under the same conditions. The cooling system of a turbo engine is sized for when you are making maximum boost. In city driving you have excess capacity compared to an equivalent NA engine.
4. Again in city driving you are seldom in boost so the load on the engine and heat being generated is no different than a NA engine. The oil doesn't have to work any harder than the oil in a NA engine under the same conditions. The oil may get the "crap beat out of it" but its from lots of WOT high boost time not city driving.