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#1
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gas mileage 5.7L
'99 5.7L extended cab 4x4. What kind of gas mileage is realistic for this truck? Guy told me he'd gotten 23mpg on the highway, that sounds unrealistic to me
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![]() This ain't your grandma's car!!
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#2
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Re: gas mileage 5.7L
I would say that is optimistic at best. A C1500 std cab is rated 17 mpg highway by EPA. Add 4wd and the extended cab weight and it drops to 16 mpg.
The only way I see of even approaching that is by driving at the lowest speed possible to be in O/D and full TC lockup (usually around 50 mph), no A/C running (or removed), tires fully inflated, no cargo, and a cool day. You might hit 20 mpg.
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Current Garage: 2009 Honda CR-V EX 2006 Mazda 3i 2004 Chevrolet Silverado 2500HD 2003 GMC Envoy XL 2000 Honda ST1100 2000 Pontiac Sunfire Vehicle History: 2003 Pontiac Vibe AWD - 1999 Acura Integra GS - 2004 4.7L Dakota Quad Cab 4x4 - 1996 GMC Jimmy 4wd - 1995 Chevrolet C2500 - 1992 Toyota Camry LE 2.2L - 1992 Chevrolet S10 Ext. Cab 4.3L - 1995 Honda ST1100 - 1980 Yamaha XS400 - 1980 Mercury Bobcat. |
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#3
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Re: gas mileage 5.7L
that's what I was thinking. I found the original sales sticker in the glovebox and it is rated at 17hwy.
__________________
![]() This ain't your grandma's car!!
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#4
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Re: gas mileage 5.7L
Quote:
If you have the 5.3L engine you can get 18-19 mpg in the warm weather with 4X4. max speed of 70MPH ...over that the MPG drops quickly. I just did a trip to Maryland got 18.5 MPG. 70 MPG most of the way. 2000 1500 4X4 LT ext cab.... |
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#5
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Re: gas mileage 5.7L
When I had mine I could get about 18 max on the interstate. I changed all the fluids to synthetic, K&N air filter and 35 psi in tires. Oh yea, 5w30 oil in the crankcase. Best I could get out of it.
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#6
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Re: gas mileage 5.7L
If he swears by getting 23 then I'd suspect speedo/odometer error due to aftermarket tires/rims and/or he swapped to different gear ratios in the differentials.
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Current Garage: 2009 Honda CR-V EX 2006 Mazda 3i 2004 Chevrolet Silverado 2500HD 2003 GMC Envoy XL 2000 Honda ST1100 2000 Pontiac Sunfire Vehicle History: 2003 Pontiac Vibe AWD - 1999 Acura Integra GS - 2004 4.7L Dakota Quad Cab 4x4 - 1996 GMC Jimmy 4wd - 1995 Chevrolet C2500 - 1992 Toyota Camry LE 2.2L - 1992 Chevrolet S10 Ext. Cab 4.3L - 1995 Honda ST1100 - 1980 Yamaha XS400 - 1980 Mercury Bobcat. |
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#7
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Re: gas mileage 5.7L
my guess is the guy is bad in math.
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#8
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Re: gas mileage 5.7L
If he swears by getting 23 then I'd suspect speedo/odometer error due to aftermarket tires/rims and/or he swapped to different gear ratios in the differentials.
__________________________________________________ _________________________ 23 MPG down a mineshaft! |
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