Parts/Hardware & consumables/Lubricants & greases/Kyosho Silicone Differential Oil (40cc) (9,000cst)
Kyosho Silicone Differential Oil (40cc) (9,000cst)
Kyosho

Kyosho Silicone Differential Oil (40cc) (9,000cst)

Part # KYOSIL9000B5.0(3)
Where to buy
$9.99
AMain Hobbies
Seen Oct 12, 2026
$9.99Buy
Prices are as last seen at the store; stock is not tracked.

About this part

This is a 40cc bottle of Kyosho Silicone differential oil. The thicker the oil, the less your differential will "diff out" in the corners, where the two tires will turn at different speeds. Changing the diff oil in your diffs is one of the most important tuning options for off-road buggies. Please use the pull down menu to pick the oil weight.

Kyosho also offers a smaller 20cc bottle of 1,000,000wt diff fluid (KYOSIL1000000) not present in this listing.

NOTE: It is not recommended to mix oils of different brands, as the thickness of oils of the same Cps rating may vary from different manufacturers! Stick to one brand for all your oils, so that you can reproduce the setup when its time to rebuild your diffs.

Reviews5.0 · 3 reviewsacross all options

LeRoy Churchillon Kyosho Silicone Differential Oil (40cc) (300,000cst)

Perfect for the Center diff in the Arrma Notorious.

jamin adamsVerified owneron Kyosho Silicone Differential Oil (40cc) (5,000cst)

Diff fluid will make or break your race! best to have a variety!

AnonymousVerified ownerMay 19, 2007on Kyosho Silicone Differential Oil (40cc) (50,000cst)

Previous review should have said "FRONT" differential. -//- Great for control in the center differential. A deffinate plus for the racer.

What reviewers say

Three reviewers rate this silicone differential oil 5 out of 5. Reviews mention different viscosities: one 300,000cst fluid used in a center differential on an Arrma Notorious, one 5,000cst, and one 50,000cst. Two reviewers say it provides good control in the center differential, and one notes the fluid matters for race performance and that having several viscosities is useful. Reviews are brief and the sample is small, so the evidence is limited.

  • + Good control in center differential
  • + Useful range of viscosities
  • + Suited to Arrma Notorious center diff
  • − Limited review sample
  • − Viscosity choice matters for performance
Summary generated from the reviews above.

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