Ex 5.4 MPG's? - Diesel Forum

mgraveman · 07-05-2009, 01:42 PM

I am considering getting a 2000-2003 Excursion or suburban. I would likely get it with the 5.4 instead of the powerstroke, mainly because the price of the powerstroke is a LOT higher on those trucks (maybe because they quit making them).

What kind of mileage can I expect from these? We would use this mainly empty to move the family or to pull the boat around, but it would be mianly highway driving, and only about 10k miles per year. We have other vehicles.

chilidog101 · 07-06-2009, 12:32 PM

Well the 5.4 is good but mileage will kill you the MPG will make up for the cost difference in the long run. A friend of mine had a 5.4 in a truck and his average was about 12-15 mpg. I have a 7.3 and average about 15-18 mpg and still have the ability to haul a lot of weight. 7.3 is the way to go just my 2 cents

hco4x4 · 07-06-2009, 07:26 PM

min has a 15 inch lift on 40's i make 8.5

NJSuperduty · 07-06-2009, 08:34 PM

i have a 6'' lift with 37's, 4.10 gears with a throttle body spacer and k and n air filter and im getting steady 13mpg highway

hco4x4 · 07-07-2009, 06:18 AM

damn, which of those made the most improvement?

mgraveman · 07-07-2009, 09:30 AM

Quote:

Originally Posted by chilidog101

Well the 5.4 is good but mileage will kill you the MPG will make up for the cost difference in the long run. A friend of mine had a 5.4 in a truck and his average was about 12-15 mpg. I have a 7.3 and average about 15-18 mpg and still have the ability to haul a lot of weight. 7.3 is the way to go just my 2 cents

Using your numbers it's a nearly break even proposition, not considering the higher purchase price of the diesel ($5k currently). I've had three diesels now, an IDI, a powerstroke, and a duramax. I'm pretty sure none of them got me paid back on fuel. I do like them though....