Jefk

well, im looking at upsizing from my 2002 f150 4.6 to an f250 this summer, and the the two contestants are currently a 2004 4wd 5.4gas with 70k miles and a 2008 4wd 6.4desiel with 80k miles. which one will perform better? make better fuel eco? and stuff.

Luckyse7ens

get the newer diesel

the 3v 5.4 is a step down from the 2v

w0lvez

DIESEL has better Fuel Economy, Towing Performance, More LOW RPM Torque. The only problem with a Diesel Engine is the Parts and Tools are so expensive. But 6.4 is too big engine. In other countries Diesel will be best choice because it's a lot cheaper than Gasoline.

6.4 Liter Diesel Engine is used in a 20 Feet Truck with 10 Ton Capacity.

BrowningSCrew

Diesel. The 5.4's in F-250's are complete dogs

Jefk

i figured ide mention im looking at about 60%daily driving, 10% mudding and goofing around with freinds and the rest work

Z7What

Get the diesel. Just did a DPF Delete with 5" Exhaust, Intake and Tune on a guy at works 08 6.4L 4X4. Making 500ish RWHP and just got 19-20MPG on a trip last week.

Wayne

w0lvez

Nothing to do with the topic.

my67falcon

Let's stick to the OPs question and skip the personal agenda please.

Z7What

It is on topic, he asked about performance and mileage.

The 5.4L gets ****ty mileage in the F150 and power isn't the best. Stick it in a much heavier F250 and it's more of a dog.

The 6.4L diesel makes great power but in stock form the mpg isn't the greatest, 10-15mpg. But when the mods are done like I listed the power is increased by 200rwhp+ and mileage also goes up ALOT! That's why I posted what I did.

Wayne

Z7What

What personal agenda do I have? I'm not trying to sell him anything or will make personal gains from my post. As I said above he asked about performance and MPGs. I listed what the diesel has the potential of getting with those mods.

The 5.4L doesn't and wouldn't ever come close to the performance or mpg of the 6.4L. The resale value is also ALOT more than the 5.4L.

Wayne