My owner's manual calls for 75W-85 (API GL-4) MTF but I just flushed that and put Shell Spirax S 75W-90 (API GL-5, MT-1, pour point -45C) synthetic I got from my brother's supply.
The transmission was very stiff (until warmed up) on cold winter days with the OEM stuff. Could it have been dino oil? Is 75W-85 readily available in stores?
The Spirax did great when I put it in my former '05 Corolla. Shifting when cold in the winter was just like in the summer and fast idle speed almost gained 200 RPM.
I hope to improve the cold shifting of my Sonata the same. So far in summer temps, the change is almost unnoticeable.
The transmission was very stiff (until warmed up) on cold winter days with the OEM stuff. Could it have been dino oil? Is 75W-85 readily available in stores?
The Spirax did great when I put it in my former '05 Corolla. Shifting when cold in the winter was just like in the summer and fast idle speed almost gained 200 RPM.
I hope to improve the cold shifting of my Sonata the same. So far in summer temps, the change is almost unnoticeable.