454 Fuel Economy?

silverado3500 · October 26, 2003

Just wondering....I found one that I like out in texas at a really good price. Just wondering what y'all typically get with a 454 unloaded. I'm not as concerned when I'm towing, because I don't have to pay the gas bill then.

Philmo · October 26, 2003

454? what year?

silverado3500 · October 26, 2003

Its a 2000. I'm not sure of the axle ratio, I'm thinking is 4.10

Shaners · October 26, 2003

I would think around 10-12 MPG's.

Philmo · October 26, 2003

so you're talking about a chevy truck with a 7.4 liter motor in it? right?

HendyPhoto · October 26, 2003

Theres no such thing as fuel economy with big blocks. Doesnt really matter what you'll get, but it wont be good!!

americanmuscleman · October 27, 2003

We've got a bunch of 1998-2000 Chevy 1 ton dually's with 7.4L's at work. I occasionally drive one, and the mileage I have gotten is 12-13mpg on the highway (all have 4.10 gears), and roughly 10-11mpg around town. I pulled a 5000lb boat on the highway at 75mph and got 10.5mpg average on two separate tanks of gas.

Even though the mileage isn't good, I really do like the Vortec 7.4L.

Cpl Punishment · October 27, 2003

A coworker has a 1-ton w/ the 454 in it ('97 or '98). He says it gets about 11 Mpg combined. Says it doesn't matter if he's towing or not, he gets 11 Mpg. Said maybe if pulling a max load it'll drop to 10 Mpg, but that's about it.

silverado3500 · October 27, 2003

Well, I have now sold my 1500, and I hopefully will be picking up my new 3500 on thursday or friday.

silverado3500 · October 27, 2003

To clarify, I wasn't expecting great fuel mileage, but I wasn't sure exactly what I should expect. Thanks for the info.

Hecktorx · October 27, 2003

I have some experience with a 99 3/4 ton suburban with a 454. It got between 10-12 mpg. One trip to central NY, towing a trailer the weighed about 4500lbs through hills, we averaged 7 mpg.

I have heard stories about those years not having the best brakes.