Boost fuel economy

[George Owens]

I just got my 08 tahoe lt about 2 weeks ago I know it needs an oil pressure sending unit switch and something with the evap I gotta change under the spare tire I forgot what it was called. I changed the oil and replaced the air filter. I know I gotta change the sparkplugs but with these newer cars do you also change the short wire or they are fine? My other car is 01 Monte Carlo ss. Also what can I do to boost fuel economy my app says I get round 11.9 mpg and the one on the truck says about 11.2

 

[njracer]

Also what can I do to boost fuel economy my app says I get round 11.9 mpg and the one on the truck says about 11.2

Best way to boost fuel economy is to sell the truck and buy something that gets better MPG. These things are PIGS!

 

[mizzouguy]

Drive like a grandma and away from the city lol. I get 10-12 city or if I'm driving like a madman. 17-19 highway cruising. A new air filter and good plugs are about all you can do assuming everything else is ok. Clean maf, clean throttle body, check upstream 02 sensors, check your tire pressures, take out extra weight, etc.

 

[08HoeCD]

Amazing how often people want to get great fuel economy and quick 1/4-mile times with these big girls.

 

[about20ninj45]

Engine tune will also improve fuel economy. As for the Evap, charcoal canister is what you need to replace.

 

[George Owens]

Engine tune will also improve fuel economy. As for the Evap, charcoal canister is what you need to replace.

No it was the evap vent solenoid I had to look for the code again

 

[George Owens]

Amazing how often people want to get great fuel economy and quick 1/4-mile times with these big girls.

Hey I just want good fuel economy

 

[swathdiver]

Bump up the air pressure in your tires 5-10 pounds; but not enough to wear the center of the tread.

 

[iamdub]

Hey I just want good fuel economy

Then why'd you buy a Tahoe? Or do you mean "good fuel economy" as far as Tahoes go? At 11-12 MPG, you must be doing all city driving and that's about the MPG you're gonna get. Cruising on a road trip, you should see 20ish. If considerably lower, then you may have a problem either with your right foot or with the engine's efficiency.

 

[iamdub]

Bump up the air pressure in your tires 5-10 pounds; but not enough to wear the center of the tread.

I've steadily been increasing the pressure from the factory specs a couple pounds at a time and gauging the treadwear every 6,000 miles when I rotate the tires. I forget what PSI I'm at now, but the tread looks fine and the average MPG is up by at least 1, conservatively speaking. I'm due for another oil change/rotation in less than 1,000 miles. I'll up the pressure a little more and be able to see quick results since I'll be taking trip in a few weeks. I'll also run mid- or even high-octane because I swear it gets at least 1MPG better with 89 or higher. If I remember, I'll post my results here.