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Reply With QuotePersonally think the 5.3 is an awesome engine... when paired with the right power to weight ratio's especially. I think the GXP, MontyCarlo and the Impala all get similar mileage.
Steven
Even the 6.0's in the Pontiacs get decent mileage.
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This is a discussion on Power and MPG within the Performance forums, part of the General Discussion category; I drove my first vehicle equipped with a LS style engine Monday, and I was very impressed. I needed a ...
I drove my first vehicle equipped with a LS style engine Monday, and I was very impressed. I needed a rental car for a trip, it was supposed to be some type of small car, but after sighing paperwork they said if I was willing to wait 10 minutes, they would have a better car ready to go, if not, then I was getting the Honda. I decided to wait.
The car was a Buick Lacrosse Super, with the 5.3L V8 and Active Fuel Management. I think that it puts out about 315HP. It would squall the tires from a 20 mph roll with TC still on.
The combined fuel economy was 20 MPG.
Highway economy was 28 MPG at 65 to 70 MPH, and 26 MPG at 80 to 85 MPH.
IMO, that's very impressive numbers for a V8 fore door sedan. Too bad it's wrong wheel drive.
1993 S10, 355ci.V8, Edelbrock MPFI, 2" TB, 6395 ECM, $0D Mask, Comp 280H Magnum cam, Edelbrock Performer RPM heads, Lincoln Mark VIII e-fan, 4L60E, 8.8 rear, 8.80s @ 79 MPH (1/8 mile), and cost to much.
Personally think the 5.3 is an awesome engine... when paired with the right power to weight ratio's especially. I think the GXP, MontyCarlo and the Impala all get similar mileage.
Steven
Even the 6.0's in the Pontiacs get decent mileage.
2007 GMC Sierra SLT Vmax 4.10 gears, Boss MT100 20x8.5 wheels/Cooper Zeon LTZ tires, Extang Bed cover,
GMC Bedrug, Line of Fire, Denali Grill, GM Performance Intake, Corsa Sport Dual Exhaust, and DiabloSport Predator.
Gettin smoked by a grandma.
1995 350 "Tool Box Injection"
Going 4/6 with 20" Billet Specialties
Don't mess with Grandma when she's late for her hair appointment!
1993 S10, 355ci.V8, Edelbrock MPFI, 2" TB, 6395 ECM, $0D Mask, Comp 280H Magnum cam, Edelbrock Performer RPM heads, Lincoln Mark VIII e-fan, 4L60E, 8.8 rear, 8.80s @ 79 MPH (1/8 mile), and cost to much.
Blue hair dye must have a shelf life?Originally Posted by 93V8S10
Don't mess with Grandma when she's late for her hair appointment!
1999 2 Door Tahoe 4x4 w/ 14 Bolt SF & TruTrac. Corvette servo, Gibson cat-back, custom tune from Black Bear, AD244 alt. upgrade, Z71 skid plates, Escalade cluster, 2" block + 1.5" crank, 285/75R16 SOLD 1/2012
2008 Silverado 1500 Z71, Borla catback, block and coil spacer
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