Using leftover diff fluid

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Apr 11, 2013 | 10:04 AM

el es tu

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Safety Car

Joined: May 2011

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From: va

Using leftover diff fluid

I have a half qt of the newer diff fluid and need to do a changeout today. Is it okay to use fluid that was opened a year ago?

thanks!

Apr 11, 2013 | 10:09 AM

boraxman

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Joined: Feb 2010

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From: Canyon Country, California

I would

Apr 11, 2013 | 10:21 AM

z51vett

Le Mans Master

Joined: Feb 2002

Posts: 5,394

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From: cumming ga

As long as the part # is the same.They keep changing the part #.
z51vett
Doug

Apr 11, 2013 | 10:59 AM

TLS_Addict

Team Owner

Joined: Oct 2007

Posts: 26,745

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From: PA

Keep the lid on the container and you will be fine.

Contamination is the only thing I would worry about.

Apr 11, 2013 | 11:25 AM

Greg00Coupe

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From: Bluffton SC via Canton Oh

I don't know but for a few dollars you can be sure by buying new......why take the chance?

Apr 11, 2013 | 11:30 AM

wrh3

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Joined: Jan 2013

Posts: 538

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From: billswebspace.com- GA

I use leftovers all the time and all of my OA results have not suggested it as a problem, it is not hydroscopic like brake fluid and if not in use would have no reason to be contaminated by condensation, etc.

Apr 11, 2013 | 01:18 PM

el es tu

Thread Starter

Safety Car

Joined: May 2011

Posts: 3,582

Likes: 46

From: va

Id like to top off my fluid with the remaining factory stuff, then if I find it necessary, do a full change this weekend.

Anyone try the premixed lucas or M1 diff fluid in the c6? My chevy dealership is a ways away.

thanks for the replies!

Apr 11, 2013 | 01:30 PM

wrh3

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Joined: Jan 2013

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From: billswebspace.com- GA

I just did a break-in change for my differential and transmission and usually switch everything over to Amsoil but they did not have a recommended fluid for the differential so I stuck with the Dexron LS Gear Oil- ordered over the web and delivered in a few days. I know some say the Mobil1 LS is the same but have read otherwise:
http://www.mobiloil.com/USA-English/...Corvettes.aspx

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Apr 13, 2013 | 08:14 AM

C66 Racing

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Joined: Aug 2001

Posts: 5,364

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From: King George VA

Quote:

Originally Posted by wrh3

Many C6 owners using the same Severe Gear 75w90 AMSOIL recommends for the C5 (and I use at the track) with a few extra ounces of friction modifier to match the high levels of friction modifier needed for the C6 diff:
AMSOIL Severe Gear Extreme Pressure Synthetic 75w90 (Product Code SVGQT)
AMSOIL Slip-Lock Differential Additive (Product Code ADATB)

For the OP, I'd use the leftover. Really no difference it sitting in a bottle for a year than in someones diff for a year. The diff has a vent plug on it so it is not a sealed unit.

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