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Increasing gas mileage on a stock 2500 6.0

2008 SILVERADO 2500 4X4

Re: Increasing gas mileage on a stock 2500 6.0

Postby skip666 » Nov 08 2011, 1:28am

Dragon wrote:A lot of things that you can do to increase performance will also increase fuel mileage especially if you stay off the accelerator. I went from 12 to 19.5 mpg by getting new exhaust, new high flow air filter, tonneau cover and making sure that I shift at 2000 RPMs, as well as going easy on the accelerator and brakes and popping it in neutral while going down hills. Getting some non-ethanol gas and a fiberglass cover this weekend hoping to break the 20 wall, gonna baby it and see if I can hit 22. Gotta love a manual tranny. :lol:


yeah definatly gotta love manual trans cuz that only works with a manny tranny making sure u keep your oil and air filter clean helps as well and the fuel filter all basic maint stuff
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K&N COLD AIR INTAKE ANY GOOD

Postby MINNESOTAMIKE [OP] » Nov 09 2011, 1:10am

Anybody know if the K&N system is any good? 08 2500 Silverado 4X4 6.0 gas.
Last edited by EKinMN on Nov 10 2011, 2:09am, edited 1 time in total.
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Re: Increasing gas mileage on a stock 2500 6.0

Postby love4chevysilverado » Nov 09 2011, 1:29am

K&N makes one of the better intakes, but for the most part almost all of the open box CAI's are going to give the same results except that the alloy intakes tend to get heat soaked, which will hinder the overall performance, but only a little

And most of the open box CAI's are in the same price range- $200-$400, any less than $200 and it's probably not as good build quality. For your application you might see 1-2 mpgs more.

Depending on how many miles are on your spark plugs (ie 60k) you could try switching to a higher quality plug like Bosch +4 Platinum's. their not much more expensive than a regular plug and you can get half an mpg more. Also if your willing to spend $300 on a CAI consider investing in an electric fan kit, you can find decent kits for under $70 on amazon, that'll account for another mpg. Every little bit adds up
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Re: Increasing gas mileage on a stock 2500 6.0

Postby MINNESOTAMIKE [OP] » Nov 09 2011, 1:36pm

Fan kit what kind who makes it and how hard is it to put on? How does it work to improve gas mileage. I have 86k on my truck maybe i should change out my plugs.
Last edited by EKinMN on Nov 10 2011, 2:11am, edited 1 time in total.
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Re: Increasing gas mileage on a stock 2500 6.0

Postby Dragon » Nov 09 2011, 4:38pm

:x Please, seriously enough with the caps
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Re: Increasing gas mileage on a stock 2500 6.0

Postby love4chevysilverado » Nov 09 2011, 5:45pm

The Fan Kit:
http://www.amazon.com/PROCOMP-ELECTRIC- ... 668&sr=8-1

It's straightforward mounting the fans, just remove your fan clutch, fan shroud, and mount them.

The wiring is a different story, it'll be a learn as you go experience when I install mine, but if your not really sure how to install it have a local mechanic put them in for you

I'm all about the D.I.Y. experience because then your not dependent on anyone if there's a problem, you can just fix it yourself, but I wouldn't want you to mess up your truck either. Bottom line: if you don't feel comfortable with doing it yourself, have someone do it for you

Hope that explains the electric fan option a little better
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Re: Increasing gas mileage on a stock 2500 6.0

Postby love4chevysilverado » Nov 09 2011, 9:09pm

Here check out this video:

http://www.youtube.com/watch?v=DZyAOW9XePI

He'll give you the rundown on the advantages of the electric fans and the basics on installing them. After he installs the fan he'll put in an intake, you can watch it if you like, the only difference is that it's a ford truck, essentially the same thing, slightly different, but it's a great walk-through if you've never done an intake before.

One last thing, he uses butt connectors for the fan, I am going to solder and heat shrink mine, I would recommend you do the same, the only difference is the stability of a soldered connection is a little more stable then butt connectors

I hope this helps you decide on your options,
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Re: K&N COLD AIR INTAKE ANY GOOD

Postby jocko463 » Nov 10 2011, 11:46pm

MINNESOTAMIKE wrote:Anybody know if the K&N system is any good? 08 2500 Silverado 4X4 6.0 gas.


Just be careful when you start looking at all the various "miracle mileage improvers" out there; make sure the cost:benefit ratio is in your ballpark. Check out the "real life" improvements versus the ones claimed by the marketing guys. For instance, K&N on their website talks about "guaranteed horsepower" but say nothing with regard to improving mileage. Spark plugs ....IMHO the best ones to run are the ones the engine was designed to use. In some cases the fancy, high-zoot multi-prong depleted uranium based titanium spark plugs can actually cause your engine to run worse than the stock plugs.

I would do some serious, serious research on the electric fan conversions before committing to installing one. Yes, there is a benefit to be had in eliminating the parasitic HP losses of running the mechanical fan, but ...these electric fans use high draw electric motors and will put an additional load on your alternator as it tries to keep the battery charged ....and there's a possibility you may need a larger capacity alternator and possibly a new radiator. Look beyond the *possible* mileage improvements versus how you use the truck (towing?; lots of heavy duty hauling; hot weather & A/C usage, etc) You could spend a boatload of money in search of maybe an mpg or two and hobble a critical system on your truck. The mechanical fan and clutch setup will draw huge CFM's of air through the radiator for low speed cooling ...you need to consider the capacities of any electric fans out there. My '06 was designed by GM for the electric fan setup but what specific design changes exist between it and the mechanical fan version I can only guess at. Here's a link to another forum about this topic for starts:

http://www.gm-trucks.com/forums/index.p ... opic=97365

I'm not trying to rain on your parade and I'd be the last guy to tell someone they shouldn't wrench on their ride ....just be careful out there and take everything with good-sized grain of salt.
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Re: Increasing gas mileage on a stock 2500 6.0

Postby love4chevysilverado » Nov 11 2011, 12:25am

Jocko - your very correct

In my case I'm putting one on to restore power that'll I'll lose once my truck is lifted two inches, I hope it'll improve fuel mileage, but no biggie if it doesn't.

one thing though, depneding on the size of the fans, the most power you'll take from the alt. is 25 amps, maybe 30, but they'd have to be some pretty big fans. Yes if you have a crapload of 12v accessories connected at once then it may put a strain on the battery and alt. For my application I'll be swapping my autocraft battery to an optima dual purpose, their a little bit more money but it should pay for itself in the long run

Remember, nothing is gauranteed

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Re: Increasing gas mileage on a stock 2500 6.0

Postby 2002summit » Dec 19 2011, 3:57am

My truck came with steel wheels. Swapping them out to aluminum OEM wheels and adding a K&N intake improve fuel economy by 2-2.5 mpg.
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