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how to get better mpg on a 1500 truck

how to get better mpg on a 1500 truck

Postby truesoldier [OP] » Aug 10 2012, 9:28pm

i need some help on some ways that are cheap to inprove my mpg on my 1994 chevy silverado 1500 5.7L V8
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Re: how to get better mpg on a 1500 truck

Postby Dr.thomasedbrown » Aug 11 2012, 7:11am

Air intake, higher flowing exhaust, throttle body spacer, programmer, on the highway don't do 70 do 55 and cruise control as much as you can.
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Re: how to get better mpg on a 1500 truck

Postby JCunningham » Aug 11 2012, 8:51am

94 is a throttle body with the injectors in it right? The the spacer would be of some use.
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Re: how to get better mpg on a 1500 truck

Postby camfire87 » Aug 11 2012, 10:34am

-Hands down, the quickest way to gain some MPG's is to keep your foot out of it. Accelerate slowly, brake slowly, keep your highway speed reasonable, and let the truck idle as little as possible.

-Otherwise I definitely recommend getting a tune up and an oil change. If your plugs are a little weak that makes one hell of a difference, and fresh high quality oil really can make a difference too.

-make sure the gas stations you fill up at have high quality fuel with the proper octane rating for your engine. Maybe try experimenting with different brands and octane levels to see if an 89 octane will get good enough mileage to offset the price difference versus an 87 octane for instance.

-I also recommend doing a seafoam treatment now and then to clean everything up, and I always run Lucas upper cylinder lube in my gas and that seems to help as well.

-Check for proper pressure in your tires, as having them inflated or deflated too much will cause poor handling and loss of mileage, not to mention wear on your treads. If it's nearing time to change your tires, you can also look for low rolling resistance treads which are noticeably smoother to drive on.

-Change your air filter. Even if you are just replacing the filter with a stock unit and not a high flow filter (though I for sure recommend getting a high performance filter because they last a lifetime and work great) it will not only improve your throttle response, but your MPG as well.

-If you're getting more air in, you also need to get more air out. While getting an entirely new exhaust system isn't really necessary since the stock one is purpose built and tuned to that motor, it is definitely a good idea to make sure that your catalytic converter and mufflers aren't plugged, because those will suck power and mileage BIG time.

-Clean up all your sensors. If the computer is getting a bad reading from any of the sensors it can cause the motor to dump in more fuel than is necessary. the O2 sensor and MAF sensor are usually the biggest culprits here.

-keep the tailgate and windows up. Even though the A/C sucks power from the engine, it is still more efficient than driving with the windows down...and mythbusters has proven that driving with the tailgate up is better than down. Although I believe that they found using a tailgate net was even better yet. I have a tonneau cover on my truck, and I can't say I've really noticed any difference in mileage with it on or off, so I don't think the initial cost of one would be worth your while as far as payback time goes. Also make sure you don't have any flapping trim pieces or unnecessary protrusions from the vehicle acting like parachutes.(unless it's functional hood scoops)

-keep weight in the truck down to a minimum (i.e. don't carry around a load of cinder blocks if you don't need to).

That's all I could think of off the top of my head. I'm sure the others here will have some more good suggestions
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Re: how to get better mpg on a 1500 truck

Postby Dr.thomasedbrown » Aug 13 2012, 7:12am

I saw that episode of myth busters, it was really good and that was a nice and very detailed write up.
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Re: how to get better mpg on a 1500 truck

Postby camfire87 » Aug 13 2012, 8:12pm

Thank doc!

Since exhaust systems were mentioned here, I recalled a thread from a while back with a super good writeup about exhaust that I think is definitely worth everybody's time to read. The 7th post down in this thread I've linked is where you'll want to look;

--> no muffler= horrible gas mileage?
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Re: how to get better mpg on a 1500 truck

Postby lilmagoo1 » Aug 13 2012, 8:23pm

on my 98 Fullsize silvy the 88-98 body style, i wasnt really intune to my mpg since it was a mud truck as well as a daily driver...i would waste 30 bucks a night if not more sometime just rompin threw mud drinking a case of beer lol...but i got usually around 15 to 16 mpg if i wasnt romping on it and watching the throttle...and i had 33x12.50 R15 a 3" lift...5 speed manual tranny, and a 350...a single in dual out exhaust with punched out cats...an intake, a throttle body spacer, and thats it...
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Re: how to get better mpg on a 1500 truck

Postby Boats4Life » Aug 13 2012, 8:26pm

All very good information camfire
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Re: how to get better mpg on a 1500 truck

Postby camfire87 » Aug 14 2012, 12:50am

I suppose one more good thing to add to the list is to get a tune done. Keep in mind that any time you make a modification to the engine you'll need to get it retuned, but if you don't plan on doing anything anytime soon a tune is an awesome way to get more power, more mileage, and make the truck run better altogether for your specific application.
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Re: how to get better mpg on a 1500 truck

Postby Silver Bullet » Aug 23 2012, 4:55pm

I installed a KN intake which made a noticeable difference so i will 2nd that statement, im also getting ready to add exhaust and not tryin to take away from your question here but for those two mods would a tune need to be done or is it fine as is?
Thanks!
And in addition i'll say that as that nice write up suggested a lot of little things can make a difference so if money is a issue i would hit all those first and see the difference it makes then afterwards start adding your performance parts to increase mileage! Also, as far as rolling down the windows goes i did my own little experiment and i kept the ac off and the windows down as long as i was goin 50mph and under and in doing so i actually saw a small increase in mileage compared to just running the ac....i think the amount of drag the wind puts on your vehicle really starts to play a role at those higher speeds and i feel thats why i saw an increase at the more mild 30-50mph speeds. Just try it. go an entire week usng one method and the next week using the other. Can't hurt to find out!
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