in terms of car fuel efficiency is there a big difference between buying 2.0 diesel and a 3.0

[MoneyMitch18]

Hi,
I'm looking to buy my first diesel car either from a private dealer or a well known garage that sells diesel cars
but the problem is that I want a 1.9 or
a 2.0 but recently I've come across good looking 3.0 diesel also so I was wondering is there much difference in terms of fuel efficiency when it comes to a 2.0 or a 3.0 diesel?

I really hope I can get a better understanding of this,

Thanks

 

[junkeymonkey]

seeing there loking like used cars theres no way of knowing - you driving habits - quality of the engineering that went into the motor- how well it gets maintained and service . next thing you got to go by it what the epa economy fuel mileage test showed for them and that's just under supervised track conditions ? is it a lot of city driving or open county roads ??

all you can do is fill up the tank drive 100 miles and see how much it burned for that 100 miles if it used 2gal. then it got 50 mpg ??

 

[rgd1101]

search online for the model and see their MPG rating.