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Old Mar 21, 2018 | 05:50 PM
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Default 03 c5 zo6 fluids

Good evening everyone,

I am making this post to see what kind of motor oil and trans oil everyone is using and recommends. I appreciate all input.

Thanks!
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Old Mar 21, 2018 | 06:57 PM
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Your going to get 50 different answers on this one lol mobile1 0w-40 motor, mobil1 synthetic dexron 3 trans, just use a good oil and trans fluid and you’ll be fine
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Old Mar 21, 2018 | 06:59 PM
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Originally Posted by 493lszosix
Your going to get 50 different answers on this one lol mobile1 0w-40 motor, mobil1 synthetic dexron 3 trans, just use a good oil and trans fluid and you’ll be fine
Thanks man, I really appreciate it!
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Old Mar 22, 2018 | 01:07 PM
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You have a 2001-2004 MN12 transmission. You can UP_Grade to any improved SYNTHETIC ATF. I personally use the AMSOIL ATF..

The AMSOIL Torque Drive ATF can also be used in the older MN6 trans without any issues. Changing the trans ATF will result in smoother shifting!!

It takes 4 qts BUT, you will only be able to drain out 3.75 and refill 3.75.

Bill

Last edited by Bill Curlee; Mar 22, 2018 at 01:08 PM.
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Old Mar 22, 2018 | 01:07 PM
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Besides personal choices that you will see posted, look thru the Owner's Manual to see what GM recommends. For example the factory fill for the C5 engines is Mobil-1 5W-30.

Most other name brands of 5W-30 oil will be Dexos1 certified so you should be able to use them with confidence. The manual trans uses DexronIII ATF. The diff uses 75W-90 synthetic gear oil with a 4 oz. bottle of the GM Limited Slip additive.

For brakes, a good quality DOT3 fluid. You can also use a DOT4 fluid for performance driving. Coolant is a 50% mix of DexCool and distilled water. Use a good brand of PS fluid.
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Old Mar 22, 2018 | 10:17 PM
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Been using Mobile 1 0w-40 for a long time (like the zinc content).

I use Redline D4 ATF for the trans.

I use Pennzoil D4 for clutch and break fluid.

Last edited by SVT_Z06; Mar 22, 2018 at 10:19 PM.
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Old Mar 23, 2018 | 11:20 AM
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Mobile 1, 5W/30 or 0W40 oil and Royal Purple Synchromax manual transmission fluid.

Steve
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Old Mar 26, 2018 | 05:41 PM
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Mobil one oil, Royal Purple for 6-speed and differential.
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Old Mar 31, 2018 | 07:23 AM
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Where can you get the GM LSD additive from? Also doesn't Mobile 1 gear oil have that additive in it already?
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Old Mar 31, 2018 | 10:58 AM
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Originally Posted by billy mild
Where can you get the GM LSD additive from? Also doesn't Mobile 1 gear oil have that additive in it already?
"GM LSD additive

LOL!! Man,,,,, My car hasn't been on a TRIP in a long time.. LMAO

Yes, Most of the 90/75 Diff Gear Lube that is Gl-5 rated has limited slip additive already in it. I have used the GL-5 Lube and have NOT had to add any extra limited slip additive.

Most of the auto parts chains have the additive in 5 0z tubes
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Old Mar 31, 2018 | 01:09 PM
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Originally Posted by Bill Curlee
"GM LSD additive

LOL!! Man,,,,, My car hasn't been on a TRIP in a long time.. LMAO

Yes, Most of the 90/75 Diff Gear Lube that is Gl-5 rated has limited slip additive already in it. I have used the GL-5 Lube and have NOT had to add any extra limited slip additive.

Most of the auto parts chains have the additive in 5 0z tubes
On my other LSD cars minus the my old Jeep the LSD additiive thats in mobil 1 seemed to suffice. Just wanted to make sure this wasn't any different.

I'm new to the C5 world. I had a C4ZR-1 before this car.
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