MPG improvement tips

[kcarz3]

We all know how good the mpg on the armada's are. I am looking for affordable tips on how to improve the mpg's. I have installed a K&N drop in filter. Anyone tried the E3 spark plug swap? What about a muffler swap? Any suggestions?

[Timmbo]

Drive like an old man! LOL, I have the K&N in my 2010 Armada, I am still "breaking in" the engine, but I am just over 14 mpg, but I am not a very frugal driver.

[C-Kwik]

Just depends on what kind of roads you drive on. City driving can take its toll. Accelerating a 5000+ lbs vehicle takes quite a bit of energy and using the brakes throws that energy away. You can try to anticipate lights ahead of you better (do be reasonable) so that you can minimize how much you have to brake. Driving at lower speeds tends to conserve more fuel as well. The faster you go, the more aerodynamic resistance there is. Its not linearly proportional to speed so the amount of aerodynamic resistance at 80 mph will be 4 times the amount at 40 mph. Not saying to drive at 40 on the highway, but its just so you have an idea of the effect of speed. And the amount of aerodynamic resistance in a truck or SUV is already higher than in a coupe or sedan. Not to mention higher speeds also means higher engine speeds. Higher engine speeds are also subject to higher aerodynamic resistance to the engine's internal parts as it has to cut through the air inside the engine. The reality is big vehicles are simply not conducive to great gas mileage. I get about 12 mpg in the Titan.

[webturtle]

Highway driving (speed limit in CA 65) going the speed limit I get 17 - 18 mpg. In the city it's a dog, 12 - 14 mpg. I really don't see any way around it. You've got a moderately sized V8 and a heavy vehicle, what are you going to do?