A very small vehicle with a small engine is most likely to use less fuel.
The smaller the engine the less fuel it will use. But then again an engine too small for the application can use more fuel than a larger engine that is appropriate for the application.
In the United States the most fuel efficient pickup truck is the Ford Ranger with a 4 cylinder engine.
Many SUV's are not fuel efficient.
2.5 liter engine is smaller and more fuel efficient. 3.5 liter engine is a strong engine with better acceleration, but is less fuel efficient
In the United states the Toyota Prius is the most fuel efficient car using a hybrid of electric and fuel in a 4 cyclinder engine allows close to an average of 50 miles to a gallon on any commute.
The honda cb 110 is the most fuel efficient motorcycle in it's class
Yes, the indirect injection is more fuel efficient because it provides stability to the engine.
When it comes to fuel efficient and luxury cars the best bet is to compare hybrid-engine designs. More and more luxury car companies are now coming out with fuel efficient hybrid-engine designs.
CRDi
The most dependable fuel efficient car of 2014 is the Ford Focus.
The 2012 Mitsubishi is one of the most fuel efficient SUVs in the market. It has 112 MPG and is very fuel efficient. I recommend the 2012 Mitsubishi for your needs.