Anyone change M/T 6 spd oil yet?
- Thread starter dvn
- Start date
TheBlueBomber
New member
Got my email reply from Lucas oil and he said that their 75-90 gl5-gl4 rated oil should be diluted with their oil stabilizer to make it safe for yellow metal synchros
sx sonic
New member
sx sonic
New member
I'd swapped over to Lucas 75w-90 synthetic awhile back because I was getting the 2nd gear grind during high RPM, quick shifts.
It remedied the grind but made normal 1-2, 2-1 shifts cumbersome until warm, and down right annoying with winter temp shifts.
Just recently switched to Amsoil 10w-30 Syncromesh and it was a TON better shifting with a cold trans, normal shifting was also marginally improved, and still no hint of any 2nd gear grinding during quick high RPM 1-2 shifts.
It's as good as the guys on Cruzetalk claim, and I'm immune from placebo affects and shy away from the bandwagon so I was skeptical of the "massive" improvements at 1st.
It remedied the grind but made normal 1-2, 2-1 shifts cumbersome until warm, and down right annoying with winter temp shifts.
Just recently switched to Amsoil 10w-30 Syncromesh and it was a TON better shifting with a cold trans, normal shifting was also marginally improved, and still no hint of any 2nd gear grinding during quick high RPM 1-2 shifts.
It's as good as the guys on Cruzetalk claim, and I'm immune from placebo affects and shy away from the bandwagon so I was skeptical of the "massive" improvements at 1st.
TheLorax
New member
I swapped it out yesterday for amsoil synchromesh in 5w30. It falls in to gears easier now and the 1-2 grind seems to be gone. I havent tried it with a cold engine but I would never goose it that hard prior to warming up the engine unless it was to avoid a wreck.
So far I'm very impressed but only have 10 miles on the stuff.
Sent from my SAMSUNG-SGH-I337 using Tapatalk
So far I'm very impressed but only have 10 miles on the stuff.
Sent from my SAMSUNG-SGH-I337 using Tapatalk
schofell84
New member
45k on my '13 RS and I put about 400mL of the Valvoline Syncromesh stuff in because it was all they had at AAP. Very noticeable difference. I will be doing the amsoil swap in a few weeks.
SmoothSonic
Member
Does 75w-90 affect or decrease gas mileage?
Has anyone tried 75w-85 to see if it remedies the grind?
Has anyone tried 75w-85 to see if it remedies the grind?
5.0
Member
No difference in fuel mileage.
$ub$onic
The Sticker Guy
75-90 has no bearing on milage
75-85 is factory
Most people solve or atleast help the issues by using synchromesh
I've sold a good bit to sonic owners
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$ub$onic
The Sticker Guy
We sell AMSOIL for it but any topshelf company will work
Royal purple, Mobil ECT
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Palmaris
New member
small note: I am using the 5spd
I also switched to the Syncromesh but it was from the stock oil.
I expected it to improve the cold weather shifting and overall reliability.
My surprise was that cold weather (cold fluids) shifting seemed to be about the same...??? But once it is warm or during the summer months it just shifted flawlessly. So I think that just the regular fluid did a pretty good job adapting to cold weather based on my understanding of Amsoil's quality of fluids.
It's a great improvement!
