“Replacing the OEM thin brown (after 3k miles) 75W-80 oil with Castrol TRANSMAX Manual Multivehicle 75W-90 has made the gear shifting smoother and eliminating a small amount of "notchyness" and even sounds quieter, I don't believe this is my imagination. Same cold shift as before but offers the benefits of increased higher temperature viscocity when hot which will contribute to a longer lasting gearbox. Makes no difference to the mpg either!”
“I already have Transans 75w90 in my gearbox, been reccomended to change oil every 10 years (manufacturer reccomendation is 96,000 miles) current oil is 10 years old, I bought 2 litres for a change in next couple months. ( oil has only covered 20,000 miles!”
