Diff oil is the silicone fluid inside a differential. Its thickness controls how freely the wheels turn at different speeds, which affects traction and steering.
Diff oils
RC diff oil in a wide range of weights for front, centre and rear diffs.

Hudy 300.000cSt 100ml Diff Oil #106631
SKU: 10663119,90 €In stock (3)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 300.000cSt 50ml Diff Oil #106630
SKU: 10663013,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 3000cSt 100ml Diff Oil #106431
SKU: 10643114,90 €In stock (7)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 3000cSt 50ml Diff Oil #106430
SKU: 1064309,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 40.000cSt 100ml Diff Oil #106541
SKU: 10654114,90 €In stock (2)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 40.000cSt 50ml Diff Oil #106540
SKU: 10654010,90 €In stock (1)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 4000cSt 100ml Diff Oil #106460
SKU: 10644114,90 €In stock (7)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 4000cSt 50ml Diff Oil #106440
SKU: 1064409,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
HUDY 50.000cSt 100ml Diff Oil #106551
SKU: 10655114,90 €In stock (2)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 50.000cSt 50ml Diff Oil #106550
SKU: 10655010,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 500.000cSt 50ml Diff Oil #106650
SKU: 10665018,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 5000cSt 100ml Diff Oil #106451
SKU: 10645114,90 €In stock (6)Delivery within Estonia 2-3 working days, other European countries 10 days.
Frequent Questions & Answers
What does diff oil do?
How do I choose diff oil weight?
Thicker oil tightens the diff for more forward traction, thinner oil frees the car up to turn more easily. Tune front, centre and rear separately to balance handling.
How often should I change diff oil?
Change it when the car feels different or after a rebuild. Racers refresh it regularly, while casual drivers can go longer between changes.
What weight goes in front, centre and rear?
It depends on the car and track, so check your setup sheet. As a rule, a thicker centre diff adds stability and a thinner front adds steering.












