V6 vs V8 Fuel Economy and better buy question

[AeroRamer]

I've always purchased V6 cars thinking they are more fuel economical than their V8 counterparts. I am looking to replace my V6 2000 Ex Limited and in looking around I've seen a few articles that show a similar fuel consumption between a V6 Ex and a V8 Ex.

For example a 2007 V6 is listed with 14/20 MPG vs a 2007 V8 listed with a 13/20 MPG. Is that correct?

If there is no big difference in fuel economy between a V6 and a V8, then I am starting to think that a V8 may be a better buy. I tow a couple of motorcycles several hundred miles about 4-6 times a year. With my V6 as long as I do not start riding hills I have no problems.

I am getting about 20 MPG right now with my 2000 V6 Ex.


Fuel Comparison source:
http://www.fueleconomy.gov/feg/Find.do?action=sbs&id=16259&id=16261&id=23725&id=23726

 

[2000StreetRod]

reliability

The 4.6L V8 should be more reliable than the 4.0L V6.

 

[AeroRamer]

The 4.6L V8 should be more reliable than the 4.0L V6.

I am guessing that is because of the bigger engine been able to handle the load better or is it a better built engine?

 

[2000StreetRod]

cassette failures

The V6 timing chain cassette guides (there are two) fail which can cause the pistons to strike the valves.