HOW CAN I GET BETTER GAS MPG OUT OF MY 2003 ENVOY XL

25

Asked by Mar 19, 2008 at 01:29 PM about the 2003 GMC Envoy XL SLT 4WD

Question type: Maintenance & Repair

2 Answers

6,845

They are not known for fuel mileage, but I would recommend that you dont "jack rabbit" for stops, drive the spped limit, keep it tuned and stay on top of all oil changes, you might want to look at a better exhaust and air intake, this will help make the engine more effient. the 5.3 get 13MPG city and 16MPG on the highway, you should see an average of about 14MPG mixed driving the 4.2 dosent get much better mileage. They are heavy trucks and they were not designed for fuel mileage. here is a link for your fuel rating http://www.fueleconomy.gov/feg/calculatorCompareSideBySide.jsp?column=1&id=19161

3 out of 3 people think this is helpful.
125

I have been reading that going 100% synthetic (oil, trans, and rear,) will make a difference by decreasing friction and it's supposed to last longer. I cannot find any real data on how much more efficiently. So far, I have changed over and am running full synthetic motor oil and have noticed no difference! Also someone on this site recommended Amsoil products. They make all three (motor, transmission, and rear.) With a 6 cylinder, we should be getting 18MPG on the highway. Hope that helps!.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Transmission or computer issues envoy 2003 3 answers

    My envoy runs until it gets hot then it acts like it has no power to the tranny and I push the gas petal and it idols up but doesn't move.

    2003 GMC Envoy XL SLT 4WD

    -

    Maintenance & Repair

  • Have done everything, but fuel economy has DECREASED 3 answers

    Purchased this vehicle 2 years ago. In 2010, I was getting great fuel economy, I had no complaints. 500-600lms (300-360 miles) on a tank. I changed the air filter in August, and was not getting ...

    2003 GMC Envoy XL SLE 4WD

    -

    Maintenance & Repair

  • GMC envoy SLT xl won't start

    Hi, my 2003 GMC envoy won't start. It cranks but won't start. I've brought a new battery, oxygen sensor, crank sensor, throttle body assembly, cam shaft sensor. My security system was reset and st...

    GMC Envoy XL

    -

    Maintenance & Repair

  • 2003 Envoy.. 1 answer

    My car will drive forward but will not go in reverse..any suggestions could it be a small fix or automatic need for new transmission?

    2003 GMC Envoy XL SLT

    -

    Maintenance & Repair

  • 2004 Envoy XL Rough Idle 5 answers

    I have a 2004 Envoy XL and it idles rough when in Drive. No other problems other than the rough idle. I took it to a mechanic and he noticed what I was talking about but couldnt find anything wrong ...

    2004 GMC Envoy XL SLT

    -

    Maintenance & Repair

Search GMC Envoy XL Questions

GMC Envoy XL Experts

#1 mhgcards
mhgcards
Reputation 180
#2 John Leone
John Leone
Reputation 140
#3 COMETGUY61
COMETGUY61
Reputation 110
View All

Related Models For Sale

Used GMC Envoy
52 Great Deals out of 2,096 listings starting at $1,800
Used GMC Yukon
357 Great Deals out of 16,994 listings starting at $2,500
Used GMC Yukon XL
264 Great Deals out of 11,876 listings starting at $1,999
Used GMC Envoy XUV
143 listings starting at $3,350
Used Chevrolet Tahoe
563 Great Deals out of 27,153 listings starting at $999
Used Ford Explorer
802 Great Deals out of 74,709 listings starting at $750
Used Chevrolet TrailBlazer EXT
15 Great Deals out of 979 listings starting at $1,500
Used Chevrolet TrailBlazer
91 Great Deals out of 4,437 listings starting at $899
Used Dodge Durango
246 Great Deals out of 22,799 listings starting at $1,500
Used Chevrolet Suburban
336 Great Deals out of 18,770 listings starting at $2,295
Used Ford Expedition
405 Great Deals out of 25,163 listings starting at $1,750
Used Honda Pilot
339 Great Deals out of 20,719 listings starting at $2,199

Used Cars For Sale

2006 GMC Envoy XL SLT 4WD For Sale
27 listings starting at $3,600
2005 GMC Envoy XL SLT 4WD For Sale
37 listings starting at $3,950
2004 GMC Envoy XL SLT 4WD For Sale
55 listings starting at $2,295
2003 GMC Envoy XL SLT 4WD For Sale
34 listings starting at $800