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Simple ways to increase MPG?

Simple ways to increase MPG?

Postby outdoorz [OP] » Mar 27 2012, 3:11am

I have a 1999 gmc sierra with a vortec v8 5.3l and was wondering what I could do to get better mpgs. I dont have any electronics that tell me what I'm getting but I am guessing its around 14mpg. I hardly ever haul anything if that changes anything.
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Related Topics  Should I get an intune if my desire is only to increase MPG?   Mpg   Mpg   MPG calculations   Trip MPG   why am i getting such bad mpg?   MPG down 50% - Any Ideas?   MPG Problems with my silverado   Sudden MPG drop   Rpm fluxuation Around 45-50 Mpg   newer duramax mpg   2015 2500hd mpg   2015 2500hd mpg   2014 2500hd mpg 
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Re: Simple ways to increase MPG?

Postby 1500VHO » Mar 27 2012, 3:22am

Hi Outdoorz,

Beside the normal, tune up, air cleaner change, proper tire pressure, etc, etc, etc...

Things you can do, but won't like...

1) When driving on the interstate or highway - keep it at 55 - 60 mph...

2) You can purchase a fuel gauge that uses vacuum... It's a simple set up. It will show three areas of fuel economy. Green is good, Yellow is poor and Red is bad... Keep the needle in the green range which reflects high vacuum, and you'll get the absolute best mpg... It will be very tough to drive like that though... I've tried.

I hope this helped, :-)
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Re: Simple ways to increase MPG?

Postby outdoorz [OP] » Mar 27 2012, 3:24am

Thanks for the reply! Can u give me a link to the fuel gauge vacuum?
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Re: Simple ways to increase MPG?

Postby danp129 » Mar 27 2012, 5:08am

Keep your RPM as low as possible. If nobody is behind you then before going up a hill put your foot on the pedal and cancel cruise control. Don't push your foot down further to maintain speed just keep your foot still and once your over the hill and get back up to your old speed, resume cruise control. The point is you will be keeping your transmission from shifting down and revving then engine over 2000 RPM. Be nice and don't slow down more than 5mpg if people are behind you though.

When you are coasting to a lower speed don't rest your foot on the pedal, lift it completely, the RPM will drop lower.

When you know you have to stop ahead, lift your foot off the gas as early as possible the more you have to brake, the more gas you've wasted.

Sometimes, slower is faster. If you know you your light is fixing to turn green but are going so fast that you'll have to stop or almost be stopped by the time it turns green, slow down with the brakes at the beginning of your coast to a speed that you will make the green light if you coast the rest of the way. You may find you have more speed when it turns green. Obviously leave yourself time to stop if it doesn't turn green by the time you expected.

Clean your Mass Air Flow sensor. Test intake manifold for vacuum leaks, replace any cracked vacuum lines.

Maybe somebody will chime in about O2 sensors, whether you can test them or just have to replace them sometimes.

If using cold air intake, try going back to factory and see if it helps. Your motor has to use more gas to match the extra air to maintain the fuel/air ratio. On the same note, you also want a clean filter in your factory air box.

If you have a ton of miles on your truck, your catalytic converter could also be a culprit. I've been told if you drill small hole before and after the cat and there don't both blow the same amount of air, then it may be time to replace it. Of course if you're not a really good welder and can patch those holes, I wouldn't attempt that :)
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Re: Simple ways to increase MPG?

Postby 1500VHO » Mar 27 2012, 5:45pm

outdoorz wrote:Thanks for the reply! Can u give me a link to the fuel gauge vacuum?


Hi,

Absolutely...

Mounts to your OBD II port: Amazon

Actual vacuum type gauge: eBay

Those should give you some ideas. Keeping the vacuum as high as possible under all driving conditions will lead to improved fuel mileage, if you can drive this way...

:D
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Re: Simple ways to increase MPG?

Postby Damion » Mar 27 2012, 5:49pm

Whats been said already, a good plug change will help also.

I was getting 15-16mpg ( town driving ) and after putting exhaust, intake and chip im now getting 20-23mpg.

Just food for thought
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Re: Simple ways to increase MPG?

Postby BigRedPickup » Aug 25 2012, 3:11am

I know this post is months old.. but I have a 1999 GMC sierra 1500 5.3L and I get about 16.5mpg all around driving. I noticed that the user "damion" in this post said he did a chip, exhaust, and something else, and got much better gas mileage.. does anyone have some ideas on what he may have done? Or where I could look to improve gas mileage?

Thanks

Matt
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Re: Simple ways to increase MPG?

Postby BlackZ71Silverado » Aug 25 2012, 10:08pm

BigRedPickup wrote:I know this post is months old.. but I have a 1999 GMC sierra 1500 5.3L and I get about 16.5mpg all around driving. I noticed that the user "damion" in this post said he did a chip, exhaust, and something else, and got much better gas mileage.. does anyone have some ideas on what he may have done? Or where I could look to improve gas mileage?

Thanks

Matt



Stay away from any and all "chips"....All they do is give a false reading to your ECM, that's it. With the false reading, his mpg's are most likely false as well. These things are a gimmick, if you want results get a tune.
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Re: Simple ways to increase MPG?

Postby BlackZ71Silverado » Aug 25 2012, 10:10pm

Damion wrote:Whats been said already, a good plug change will help also.

I was getting 15-16mpg ( town driving ) and after putting exhaust, intake and chip im now getting 20-23mpg.

Just food for thought



Not saying you are lying BUT.......no way you gained 5mpg's, not happening, ever. If you were able to somehow increase the mpg's that much, you should be an engineer for GM, they would love you.
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Re: Simple ways to increase MPG?

Postby KBacon » Aug 25 2012, 10:21pm

BlackZ71Silverado wrote:
Damion wrote:Whats been said already, a good plug change will help also.

I was getting 15-16mpg ( town driving ) and after putting exhaust, intake and chip im now getting 20-23mpg.

Just food for thought





Not saying you are lying BUT.......no way you gained 5mpg's, not happening, ever. If you were able to somehow increase the mpg's that much, you should be an engineer for GM, they would love you.


Although I basically agree with you... If he had a dirty/clogged air filter, overly restrictive exhaust, or ce codes stored in the ecu... Then adding the above may have netted him the claimed 5mpg... Not saying that this is the case... But could be a possibility!!! You can go from 14mpg to 20mpg just by changing driving habits... Or comparing interstate driving to city stoplight driving
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