2001 Blazer LS 4x4 better gas milage

[pbuehlz]

I have a 2001 Blazer LS 4x4 that I am looking to get better gas milage out of. It has 138000 miles on it. I just got done Seafoaming it and check the air pressure in the tires. I have been regularly getting 17-18 mpg on the highway. Am I just dreaming thinking it can get better than that? Is there any simple low cost mods that I can do? I am hoping that the seafoaming will get me a 1 or 2 mpg differance. I drive 70 miles per day round trip 6 days a week. All help would be apreciated.

Thanks Much

[D-Caf]

What do you consider low cost?

Before my S/C install (and hence a new lead foot), I got better gas mileage on my '98 LS Blazer 4x4 with the three following mods (and a lighter foot):

Dynomax Cat-Back kit (could only find up to '99, might fit?) = $110

K&N FIPK Intake System = $275

HyperTech PPIII = $399

The Cat-Back kit is a good deal if you can find one that fits your year truck. The other two are more expensive, with the Hypertech adding the least in the MPG quest.

With these, I could regularly get 22+ mpg on the highway (at no more than +5mph over the speed limit 65mph, the faster you go past 60mph and the less fuel efficient you are).

I have both a the K&N kit to sell used, and a HyperTech PPIII to sell. I Just need to clean up the K&N and make sure I have all the parts, and I'm not sure what year my PPIII covers, I think it covers up to 2000 or 2001, not positive. They were both made redundant when I installed my Supercharger which includes it's own intake and programmer.

[ABCAUTO2]

The under drive pulleys are a good choice if you do a lot of Highway driving

[pbuehlz]

95% of my driving is hwy miles. Is 17-18 mpg normal for interstate driving? I live 3 miles off the interstate and my work is 1-2 miles off the interstate. I drive 38 miles each way. 38 miles x 2 times a day = 76 miles per day x 6 days a week = 456 per week / 17 mpg = 27 gal of gas per week.

[Sparky2263]

Underdrive pulleys, electric fan, headers. Those are real good efficiency mods.

[pbuehlz]

Would a throttle body spacer help? If so how hard would they be to install?

[T Man]

not for your vehicle. Listen to what these guys say.

[Chuck1026]

These trucks like to drink fuel. Make sure you have a clean air filter. The guys on here have a bunch of good ideas. I tried switching to Mobil 1, but saw now fuel economy increase. The motor does seem to run quieter so I am sticking with it.

The only way I save fuel on the highway is to plan ahead and try to keep out of the gas... seems like once I break 62 mph, the fuel economy drops (according to my instant economy guage on the overhead).

[blazerboy]

I usually get around 20-21 mpg during the non-oxygenated fuel months. During winter they oxygenate the fuel around here so gas milage goes down to somewhere in the vicinity of 17-18.
I'm driving a '99 4 dr 4X4 with K&N, flowmaster muffler (it was free), and an HPP3 (but I only use it for tire size compensation - as I'm running 31" tires).

[mrmidnight]

try going to a thinner oil as well, I see that you are in MD so right now would not be a good time to go thinner, but summer would be ok, I used 5w-30 in my dodge v8 and I have no problems and better milage