4.8L v8 Gas Mileage?

Khaos05 · January 4, 2007

The website says that the 4.8L v8 will get 16mpg city and 21mpg highway...is this accurate?

07SilveradoClassic · January 4, 2007

I have just passed 10K on mine (07 classic crew cab) and with 50 mile urban commute and several cross state trips, the worst tank was 16.9 MPG the best has been 19.8 (today mostly highway @ 75mph) . most have been around 17.8-18.2

Khaos05 · January 4, 2007

I have just passed 10K on mine (07 classic crew cab) and with 50 mile urban commute and several cross state trips, the worst tank was 16.9 MPG the best has been 19.8 (today mostly highway @ 75mph) . most have been around 17.8-18.2

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sweet, so according to auto websites and enthusiast forums, chevy's 4.8L gets 2mpg better than fords 4.6L/5.4L

2007 chevy silverado z71 4.8L - 16/21

2007 ford f150 4x4 4.6L - 14/18

2007 ford f150 4x4 5.4L - 14/17

do these sound correct? And to those who have the 4.8L v8 - does it have enough power for your needs?

07SilveradoClassic · January 4, 2007

I'm happy with it, one of my salesman has an F150 Crew Cab with 4.6 and he says his a dog compared to my 4.8. His mileage has been worse too.

Khaos05 · January 4, 2007

I'm happy with it, one of my salesman has an F150 Crew Cab with 4.6 and he says his a dog compared to my 4.8. His mileage has been worse too.

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what about the 5.3L v8 chevy offers...according to review and the website it gets the same EPA mileage...and i know someone witha 5.3L and they avg 18mpg in the city...

CoastyAV8R · January 4, 2007

My 4.8 has over 100,000 miles on it and still gets 20 mpg driving back and forth to work(20 miles each way, 12 miles of freeway). Of course the rear end gearing in this thing has me hitting 1700-1800 at 65 mph. It gets the same mileage as my wifes' 4 door Tacoma PreRunner. I can't imagine the 5.3 would do much worse and has a few more ponies...

whipiyako · January 4, 2007

The website says that the 4.8L v8 will get 16mpg city and 21mpg highway...is this accurate?

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I have a 2006 Crew cab with the 5.3L V8 and On the highway I average 18mpg but I have seen it as high as 19-20 on long runs, and in the city I average 14-15mpg I would get the 5.3 and get a little more power for a couple of mpg. Of course this all depends on how heavy your foot is.

Bruce03Silverado · January 4, 2007

I average about 15-16 hwy but I also have a 3" BL with 305/70/16 tires. I added a cold air kit, Superchips tuning and a Magnaflow catback and got some of the mileage back that I lost.

Buggle_96 · January 4, 2007

I have just passed 10K on mine (07 classic crew cab) and with 50 mile urban commute and several cross state trips, the worst tank was 16.9 MPG the best has been 19.8 (today mostly highway @ 75mph) . most have been around 17.8-18.2

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sweet, so according to auto websites and enthusiast forums, chevy's 4.8L gets 2mpg better than fords 4.6L/5.4L

2007 chevy silverado z71 4.8L - 16/21

2007 ford f150 4x4 4.6L - 14/18

2007 ford f150 4x4 5.4L - 14/17

do these sound correct? And to those who have the 4.8L v8 - does it have enough power for your needs?

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Everyone with the new F-150 is lucky to break 13 mpg overall. I did have a buddy with a 99 f-150 get 20 on a long trip. Don't determine a truck on its mpg rating, the gm's happen to get better than dodge or the fords from what i have seen. Go with the 5.3L.

OFF-RD · January 4, 2007

I've owned all three brands. I can tell you for certain that the GM fullsize truck will average 3-4 miles per gallon more than the Fords or Dodges. 3-4 miles per gallon doesn't sound like much, but multiplied over 26 gallons for each tank, it adds up quick during a year.

CapnDean · January 6, 2007

CapnDean gets between 18 - 20 each tank. I drive 14 miles each way to work & back. 7 miles of the trip are interstate @75 mph.

I have almost 90K on the truck (2001 ext cab 2WD 4.8L). To date I have not changed the plugs.

I am happy with the performance and plan to tune it up when I notice a drop.

GMCStepSide · January 6, 2007

My last truck that I recently traded was a 2005 GMC Sierra Ext Cab 4x4 with the 4.8L. My new truck is a 2006 GMC Sierra Ext Cab 4x4 with a 5.3. I get the exact same mileage with my 5.3 that I got with the 4.8 but the power is noticeable different. I differed with a couple fellas in the past about the 4.8 vs. 5.3 mileage but can now tell you from experience that they're identical. The biggest difference I see is when I'm in the hills...the 5.3 pulls up the hills alot easier without the tranny having to shift a gear to maintain speed. The 4.8 is a good motor but for the difference in power, I'll take the 5.3 any day.

P.S. I was getting 18-19 with the 4.8 and get the same with the 5.3 in mixed driving and can easily do 20 on the highway staying at crusing speed (60 mph). My mileage did go down in the winter due to idling but I still get 17 in mixed driving.

ratcliffm · January 6, 2007

I've got a '98 4.3L V6.....gettin about 12 MPG. Something maybe wrong?

Khaos05 · January 7, 2007

My last truck that I recently traded was a 2005 GMC Sierra Ext Cab 4x4 with the 4.8L. My new truck is a 2006 GMC Sierra Ext Cab 4x4 with a 5.3. I get the exact same mileage with my 5.3 that I got with the 4.8 but the power is noticeable different. I differed with a couple fellas in the past about the 4.8 vs. 5.3 mileage but can now tell you from experience that they're identical. The biggest difference I see is when I'm in the hills...the 5.3 pulls up the hills alot easier without the tranny having to shift a gear to maintain speed. The 4.8 is a good motor but for the difference in power, I'll take the 5.3 any day.

P.S. I was getting 18-19 with the 4.8 and get the same with the 5.3 in mixed driving and can easily do 20 on the highway staying at crusing speed (60 mph). My mileage did go down in the winter due to idling but I still get 17 in mixed driving.

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after that comment, i'd love to get the 5.3 now...but I can get the 4.8L cheaper because the LT1 package comes with the 4.8 and it's like 1k to add the 5.3L but we'll see