M7 owners
Racer
Joined: Aug 2016
Posts: 397
Likes: 39
Read this thread again and you will see 2 camps: 1 that changes everything much earlier than what the manual recommends and the other that follows the manual. I think you will have to make your own decision on what YOU think is best. But there are countless threads here and elsewhere (Google is your friend) so do some homework and then decide. 99% of the time you ask a question here you will get different opinions (as well as every other car & motorcycle forum I have been on).
Thread Starter
Pro
Joined: Apr 2014
Posts: 568
Likes: 109
From: South Carolina
thank you all i think i will change out and use the amsoil as i hear good things the sycromax is good but the purple dye is no where close to stock GM oil and if problem can be detected and might throw red flag for a warranty
Racer
Joined: Aug 2016
Posts: 397
Likes: 39
Countless threads on that topic as well - they cannot deny a warranty claim for using a different oil that meets or exceeds OEM specs.
Burning Brakes
Joined: Feb 2011
Posts: 833
Likes: 470
From: Goodyear AZ
Its not that you should or have to change it but as others commented, certain oils will make shifting a bit smoother and less clunky. I prefer Amsoil and its always allowed easier shifting in all of my cars both auto and manual trans.
E-Ray, 3LZ, ZER, LIFT
Joined: Sep 2007
Posts: 35,015
Likes: 12,399
From: NE South Carolina
GM recommends sticking with the GM fluid. The M7 has triple syncros on some gears, quite probably 2nd is one. One is carbon faced. They indicated the GM fluid is compatible with that material.
Last edited by JerryU; Nov 10, 2016 at 11:21 AM.
Heel & Toe
Joined: Aug 2016
Posts: 19
Likes: 5
From: Clear Lake Texas
Quote:
Originally Posted by EddieA from Houston
I bought my 2016 Stingray new and have put 2,000 miles on it; the m7 is a delight, EXCEPT for a really stiff 2nd gear. Could my stiff shifting problem be mis-adjusted linkage [actually feels like a slow synchronizer issue]? Happens going both up & down into 2nd. All comments appreciated.
I'm not sure what the deal is with that. I too have a '16 Stingray (~14K miles) and my 2nd gear is also stiff (and 'notchy') and requires care to get it in gear completely. I took mine in a few months ago to check it and the dealer "adjusted the shifter linkage". Its a bit better now but its still not as smooth as all the other gears.
My solution? I don't use it (much). I routinely shift 1st to 3rd, and that is smooth as silk.
YMMV
Originally Posted by EddieA from Houston
I bought my 2016 Stingray new and have put 2,000 miles on it; the m7 is a delight, EXCEPT for a really stiff 2nd gear. Could my stiff shifting problem be mis-adjusted linkage [actually feels like a slow synchronizer issue]? Happens going both up & down into 2nd. All comments appreciated.
I'm not sure what the deal is with that. I too have a '16 Stingray (~14K miles) and my 2nd gear is also stiff (and 'notchy') and requires care to get it in gear completely. I took mine in a few months ago to check it and the dealer "adjusted the shifter linkage". Its a bit better now but its still not as smooth as all the other gears.
My solution? I don't use it (much). I routinely shift 1st to 3rd, and that is smooth as silk.
YMMV
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Thread Starter
Pro
Joined: Apr 2014
Posts: 568
Likes: 109
From: South Carolina
This is what i came up with, since the C7 have carbon sycros and not paper type as older vettes had , were ok to use synthetic oils so royal purple is more recommended over redline and amsoil tho"" they are good but some complaints that they are good at first but tend to wear out faster. so i will give it a try and post some pics of the stock 12k oil coming out so you all can take a look PS im guessing 4 quarts or slight less is that about right ? for a man oil change
Le Mans Master
Joined: Oct 2011
Posts: 7,079
Likes: 1,922
From: DFW, Tejas!
Quote:
Originally Posted by EddieA from Houston
I bought my 2016 Stingray new and have put 2,000 miles on it; the m7 is a delight, EXCEPT for a really stiff 2nd gear. Could my stiff shifting problem be mis-adjusted linkage [actually feels like a slow synchronizer issue]? Happens going both up & down into 2nd. All comments appreciated.
I'm not sure what the deal is with that. I too have a '16 Stingray (~14K miles) and my 2nd gear is also stiff (and 'notchy') and requires care to get it in gear completely. I took mine in a few months ago to check it and the dealer "adjusted the shifter linkage". Its a bit better now but its still not as smooth as all the other gears.
My solution? I don't use it (much). I routinely shift 1st to 3rd, and that is smooth as silk. YMMV
Originally Posted by EddieA from Houston
I bought my 2016 Stingray new and have put 2,000 miles on it; the m7 is a delight, EXCEPT for a really stiff 2nd gear. Could my stiff shifting problem be mis-adjusted linkage [actually feels like a slow synchronizer issue]? Happens going both up & down into 2nd. All comments appreciated.
I'm not sure what the deal is with that. I too have a '16 Stingray (~14K miles) and my 2nd gear is also stiff (and 'notchy') and requires care to get it in gear completely. I took mine in a few months ago to check it and the dealer "adjusted the shifter linkage". Its a bit better now but its still not as smooth as all the other gears.
My solution? I don't use it (much). I routinely shift 1st to 3rd, and that is smooth as silk.
YMMVI basically go 1-3-5-7 or 1-4-5-7
I almost never use 6th gear. It's like a crappy 7th gear.
Le Mans Master
Joined: Oct 2011
Posts: 7,079
Likes: 1,922
From: DFW, Tejas!
Pro
Joined: Oct 2016
Posts: 546
Likes: 89
Nah, I am good brother. I am a little weirded out with your fascination with male reproductive organs. You do understand that going above 3k or even to the redline is not being reckless? Were not talking drifting or drag racing here. For me the car sits in the garage until the weekend. I would not own it if I were going to 3k rpm. Regardless of track time. But like what ya like.
Drifting
Joined: Oct 2005
Posts: 1,729
Likes: 62
From: South Lyon MI
Originally Posted by JerryU
GM recommends sticking with the GM fluid. The M7 has triple syncros on some gears, quite probably 2nd is one. One is carbon faced. They indicated the GM fluid is compatible with that material.
Le Mans Master
Joined: Oct 2011
Posts: 7,079
Likes: 1,922
From: DFW, Tejas!
Nah, I am good brother. I am a little weirded out with your fascination with male reproductive organs. You do understand that going above 3k or even to the redline is not being reckless? Were not talking drifting or drag racing here. For me the car sits in the garage until the weekend. I would not own it if I were going to 3k rpm. Regardless of track time. But like what ya like.
Thread Starter
Pro
Joined: Apr 2014
Posts: 568
Likes: 109
From: South Carolina
To this point, the new fluid is called "Manual Transmission" fluid. Not just an atf. I'd like to talk to a Mobil rep or engineer to know if Dex 6 would work. The stock fluid is good for 275 F according to gm. I've seen 300 at spring mountain and 280 in my personal car at NCM. The dex 6 is good for 300+ and could be a benefit should it be compatible.
I think Mobil atf is the same as long as you dont see dex 4 do to the dex 4 has a diff viscosity Mobil was 2 in a test and Pennzoil was first believe it or not and Royal purple was next to last so Mobil would be a good choice for a more modern Trans oil then stock dino oil
Pro
Joined: Dec 2012
Posts: 642
Likes: 144
From: Chandler AZ
I too can't stand people who don't shift their car/bikes while in parking lots or neighborhoods. We get it, you want people to see and hear you.
Thread Starter
Pro
Joined: Apr 2014
Posts: 568
Likes: 109
From: South Carolina
M7 tans oil change
This is what i came up with, since the C7 have carbon sycros and not paper type as older vettes had , were ok to use synthetic oils so royal purple is more recommended over redline and amsoil tho"" they are good but some complaints that they are good at first but tend to wear out faster. so i will give it a try and post some pics of the stock 12k oil coming out so you all can take a look PS im guessing 4 quarts or slight less is that about right ? for a man oil change
1st - i used Mobil 1 ATF (dex3 ) seems it placed second in test and beat out the Amsoil R.P. Ect Ect . @ 9.95 quart
2nd - it took 3.5 quarts once drained
3rd - oil was starting to gray but still red was dominate and i found small grit pieces in the oil you could feel them rubbing between you fingers and see them on the oil tray
no large metal flakes and since it was colder than usual in S.C. it was thicker than the Mobil 1 that i was putting in
Very easy for anyone to do this change (i have a Max Jax) so easy to get under and work , two plugs to be removed 3/8 drive end, and my fill method was a hose in the bottle cap and apply air use blow gun into bottle and it pushes up the hose and into the fill hole very easy
conclusion was it necessary at 12K miles, no Glad to put the synthetic in rather than the dino oil, it shifts less knotchy in 2nd in the cold, and i did get out some of the break in particles total cost was 40 dollars