[Tomko]

Paging @XtremeRevolution

 

[obermd]

I used the Amsoil Synchromesh in my 2012 ECO MT. Change it out every 45K miles.

 

[XtremeRevolution]

I have a 2011 cruze eco MT and I've been looking on the forum to troubleshoot some grinding and notchiness issues I have. I'm not sure which fluid to use, it seems like every thread uses these terms interchangeably. Do I need the AMSOIL 75W-90 GL-4 or the AMSOIL Syncromesh 5W-30?

I usually recommend Synchromesh for stock cars and 75W-90 GL-4 for tuned cars. I recommend 75W-90 GL-4 where people have 1-2 shift grind issues. I recommend Synchromesh where the weather gets quite cold for much of the winter (below 0 F). Both will work, and I've swapped back and forth repeatedly.

 

[2011ecoMT]

Thanks guys Syncromesh it is.

 

[XtremeRevolution]

Remember...2.5 quarts.

 

[chevrasaki]

I've been on synchromesh for the past 35K miles with no issues, and the 1-2 grind virtually eliminated. I will be using it again. As mentioned above, the volume is very important. 2.5 quarts.

 

[Alex V.]

I switched to Synchromesh about 70K ago and with 106K and plenty of shifting (not all highway, by a long shot) and numerous hard launches she's still in one tight, quiet piece.

 

[2011ecoMT]

Changed out the fluid last week with 2.5 qts. The grinding issue hasn't come back.

 

[obermd]

Changed out the fluid last week with 2.5 qts. The grinding issue hasn't come back.

It'll come back in about 40-45K miles. That's when you know it's time to change it out again.