FatherTed wrote:
Diesel_dyk wrote:
17 city, 26 highway from an "eco engine"
That's BS my friend has a 2004 Mustang Mach 1 it supposed to get epa 17 city 26 highway. He swears he gets 29 or 30 on the highway and that's a high performance sports car.
Ford is touting its new eco engine that about the same or maybe even worse than a mustang mach 1, what's wrong with this picture. Why can't they build a more efficient engine. Hell all they would have to do is bring over some of the European diesel engines and their cars would be getting mileage in the high 30s or 40s. Ecoboost my a$$.
The fuel point is interesting, i'd never considered that.
Is our fuel generally better quality?
'Cause that gives more power, cleaner etc etc.
I don't quite follow the question but
pro Diesel - diesel fuel has more potential energy, a diesel engine has much higher compression and diesel engines are run very lean compared to gasoline engines.
con Diesel - engines require more maintenance than gas engines and some say that diesel are dirty and smelly, but so are gasoline engines
muff on diesel - new ultra low sulfur diesel makes the fuel cleaner burning but more expensive and the govts in the US and Europe are regulating diesel engines to be much cleaner.
The Ford Mustang Mach 1 has a gasoline engine. As far as a Ford Mustang Mach 1 getting the same mileage as an EcoBoost, that would be because the V8 in the mustang has a lot of torque and while horse power ratings are cool, torque is what you drive on. If you want to know your most efficient/ economical speed to travel in your car, just look at a graph of the torque for the engine that is in your car. Look at what the rpms are when the peak torque produced. That is when the engine is running at its most efficient. So when you are on the road you should try to run your car in a gear that puts you at that rpm or slightly below that rpm. For Example, my car is a 2.0 gas Jetta and I run at 75 miles per hour in 5th gear at abourt 3100 rpm, this engine produces peak torque at about 3200 rpm.
The reason why the eco boost engine underperforms compared to a big v8 is probably because the ecoboost engine is not producing enough torque [edit: or is producing its peak torque at rpms that are tooo low. That would cause the car to be driven at a point where the engine is welll past peak torque meaning that its not running efficiently.] The Mach1 v8 produces lots of torque, in fact that engine has torque curve that is almost flat so you can be running the car at peak torque at lower RPMs and still be at peak torque at higher RPM. so when you are cruising at peak torque, the car's engine is not being over worked and does not require as much fuel.
I hope your question was about one of those two things.
Last edited by Diesel_dyk (2009-03-01 20:39:09)