Can I get better MPG with synthetic in the entire drive train?

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Can I get better MPG with synthetic in the entire drive train?

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Can I get better MPG with synthetic in the entire drive... - 1/3/2008 10:31:37 AM

brandon4589

Posts: 15
Joined: 10/5/2007
Status: offline

Hi I have an alpha and I want to try to get the best MPG out of this vehicle, can I put synthetic oil in the front and rear diff, the transmission and engine and see a difference in MPG? Is there a center diff for the AWD?

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RE: Can I get better MPG with synthetic in the entire d... - 1/3/2008 11:24:49 AM

TheGunnyRet

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Joined: 11/21/2007
Status: offline

Check your owners manual on all the drivetrain places that require oil. Your tranny, if it is an automatic might already have the new Dexron VI http://www.petro-canada.ca/pdfs/IM_8017_E_v14.pdf fluid in it, so if you go synthetic you need to make sure it is compatible with the DEXRON VI. Also remember you have the torque convertor inside the tranny which holds about 5-6 qts and that does not drain out when you go and change your tranny fluid.

I have never really read any solid evidence on any significant increase in MPG. If anything you might see 2-3 MPG increase. I have heard of small gains and reduced noise.

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RE: Can I get better MPG with synthetic in the entire d... - 1/3/2008 12:57:25 PM

Hawaiian Hummah

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Joined: 8/3/2007
Status: offline

if you need better milage put your tranny in neutral and hoist the main sail matey!!!! j/k

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RE: Can I get better MPG with synthetic in the entire d... - 1/3/2008 2:45:03 PM

3hummers

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I don't know but I have a hard time believing it would make any type of noticable difference.

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RE: Can I get better MPG with synthetic in the entire d... - 1/3/2008 3:47:47 PM

rhill20

Posts: 4549
Joined: 10/27/2007
From: Delaware, Ohio GO BUCKS!
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I don't know about running EVERYTHING synthetic, but I'm running synthetic oil and haven't really noticed a difference in MPG.

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RE: Can I get better MPG with synthetic in the entire d... - 1/3/2008 7:22:34 PM

Doc Olds

Posts: 3805
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline

Sorry Brud, but ......

Automatic Transmission

DEXRON®-VI Automatic Transmission Fluid.

Front and Rear Axle

SAE 75W-90 Synthetic Axle Lubricant

(GM Part No. U.S. 12378261, in Canada 10953455) meeting GM Specification 9986115.

Transfer Case

DEXRON®-III Automatic Transmission Fluid. Look for “Approved for the

H-Specification” on the label.

Already got some synthetic except motor oil and T Case is Dex III. Can change it all out to Red Line etc., but the gain vs cost???

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RE: Can I get better MPG with synthetic in the entire d... - 1/3/2008 10:28:27 PM

TheGunnyRet

Posts: 307
Joined: 11/21/2007
Status: offline

quote:

ORIGINAL: Doc Olds

Sorry Brud, but ......

Automatic Transmission
DEXRON®-VI Automatic Transmission Fluid.

Front and Rear Axle
SAE 75W-90 Synthetic Axle Lubricant
(GM Part No. U.S. 12378261, in Canada 10953455) meeting GM Specification 9986115.

Transfer Case
DEXRON®-III Automatic Transmission Fluid. Look for “Approved for the
H-Specification” on the label.

Already got some synthetic except motor oil and T Case is Dex III. Can change it all out to Red Line etc., but the gain vs cost???

Doc, were did you get this information, I haven't been able to get a good source to download from. I like to have that info available.

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RE: Can I get better MPG with synthetic in the entire d... - 1/4/2008 5:22:34 AM

Doc Olds

Posts: 3805
Joined: 7/11/2007
From: Boat Town USA (Michigan 48045)
Status: offline

Hey Gunny. The 06 Manual for the H3. Link http://www.hummeranswers.com/

PS. My secret stash of H3 official info. It's like a fishin hole, don't go blabbering to everybody where it is.

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RE: Can I get better MPG with synthetic in the entire d... - 1/4/2008 8:12:13 AM

Desert Dan

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Joined: 3/6/2007
Status: offline

I would say you would see more improvement in MPG by increasing air pressure in your tires (rough ride) and by keeping speeds below 70 MPH (hard to do:))

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Desert Dan

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RE: Can I get better MPG with synthetic in the entire d... - 1/4/2008 9:24:49 AM

tomp

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Joined: 9/1/2005
Status: offline

-OEM diff fluid and later model trannys use Dex VI which is also synthetic
-Redline is only aftermarket oil company with fully approved Dexron VI ATF fluid
-Yes, Redline is a better full syn fluid than the OEM syn fluids.
-Yes, you will notice a smoother ride switching to a better quality diff fluid such as Redline.

I prefer redline over Royal Purple and Mobil1 as it is made with higher quality stock, uses less additives and also makes fully approved Dexron VI

(in reply to Desert Dan)

Post #: 10

RE: Can I get better MPG with synthetic in the entire d... - 1/4/2008 9:48:22 AM

TheGunnyRet

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Joined: 11/21/2007
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quote:

ORIGINAL: Desert Dan

I would say you would see more improvement in MPG by increasing air pressure in your tires (rough ride) and by keeping speeds below 70 MPH (hard to do:))

This is a fallacy and is very unsafe, with the increased pressure and when your tires heat up your blow out possibility is imminent.

Doc, thanks for the reference site.

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RE: Can I get better MPG with synthetic in the entire d... - 1/4/2008 8:47:37 PM

tomp

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quote:

ORIGINAL: TheGunnyRet

This is a fallacy and is very unsafe, with the increased pressure and when your tires heat up your blow out possibility is imminent.

Doc, thanks for the reference site.

What are you talking about? DD is 100% in what he said!

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RE: Can I get better MPG with synthetic in the entire d... - 1/5/2008 3:55:47 AM

TheGunnyRet

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Joined: 11/21/2007
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quote:

ORIGINAL: tomp

quote:

ORIGINAL: TheGunnyRet

This is a fallacy and is very unsafe, with the increased pressure and when your tires heat up your blow out possibility is imminent.

Doc, thanks for the reference site.

What are you talking about? DD is 100% in what he said!

Do you over inflate your tires, wear out the center part of your tread, cringe every time you hit a bump. If YOU do! more power to you. I don't its dumb, costly and not safe.

I would never recommend someone to do something that I wouldn't do that's dangerous. If you are that type of person then I hope it never comes back at you.

< Message edited by TheGunnyRet -- 1/5/2008 3:59:48 AM >

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RE: Can I get better MPG with synthetic in the entire d... - 1/5/2008 7:19:27 PM

tomp

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Joined: 9/1/2005
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No one said anything about over-inflating the damn tires Bro. Read the sidewall, as most hummer tires can safely handle much more air than the average person drives on. My Mickey Thompson tires say max pressue is 60psi on the sidewall. Are you telling me that you air up you tires up this high on a daily basis and you wouldnt have any room to go any higher?

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Post #: 14

RE: Can I get better MPG with synthetic in the entire d... - 1/6/2008 12:00:38 AM

TheGunnyRet

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Joined: 11/21/2007
Status: offline

And no I don't air up with higher PSI, I keep it at the recommended psi as noted on the door plate. What I meant was you recommended it and do you do it. I don't.

Plus it doesn't do anything negligible to increase MPG anyway. I don't want to get into a pi$$$$ing contest.

The real problem is, they bought a Alpha and want the mileage of a Yaris by doing what they can to it. They should have gotton the I-5.

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