
Originally Posted by
Revenant
My friends and I (owners of Carens, Matrix, Accent CRDI) have had the same problem with the aforementioned gear oil changes because the Casa insists on putting 90w GL-4s. Among the best fluidity on cold engine shifting we've experienced came from Castrol 75w-90 and a Valvoline 75w-85 which specific model I have forgotten.
Another thing to consider is that they often put too much gear oil. The Matrix and Accent for example specify 2.0 liters but draining often show around 2.5-3 liters. It wasn't until I had it done on a gasoline station, following the manual, that I have had better results.