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 15.000cSt 50ml Diff Oil #106515
SKU: 10651510,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 150.000cSt 100ml Diff Oil #106616
SKU: 10661619,90 €In stock (11)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 150.000cSt 50ml Diff Oil #106615
SKU: 10661513,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 2.000.000cSt 50ml Diff Oil #106694
SKU: 10669418,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 20.000cSt 100ml Diff Oil #106521
SKU: 10652115,90 €In stock (7)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 20.000cSt 50ml Diff Oil #106520
SKU: 10652010,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 200.000cSt 100ml Diff Oil #106621
SKU: 10662119,90 €In stock (11)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 200.000cSt 50ml Diff Oil #106620
SKU: 10662013,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 2000cSt 100ml Diff Oil #106421
SKU: 10642114,90 €In stock (7)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 2000cSt 50ml Diff Oil #106420
SKU: 1064209,90 €On backorderDelivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 30.000cSt 100ml Diff Oil #106531
SKU: 10653115,90 €In stock (5)Delivery within Estonia 2-3 working days, other European countries 10 days.
Hudy 30.000cSt 50ml Diff Oil #106530
SKU: 10653010,90 €On backorderDelivery 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.












