# Fluids

{% hint style="warning" %}
**Pro Tip — Oil Analysis**

It is highly recommended to take oil samples for analysis AND cut open oil filters at every oil change. This catches internal engine wear early and can prevent catastrophic failures.
{% endhint %}

## Engine Oil

The Rush SR uses a **shared oil system** for the engine, gearbox, and clutch.

**Recommended:** Mobil 1 Racing 4T 10W-40

**Capacity:** 3 qt without filter change | 3.5 qt with filter change

**Change interval:** Every 8 hours

**Oil Filter:** K\&N Performance KN-138

{% hint style="info" %}
Other oils may be used. If substituting, use a JASO MA certified oil (PAO/Ester Group IV+, Viscosity Index 170+). Summer alternatives: Klotz KV-1560R 15w-60, Motul 300V 15w-60. Check with your dealer if unsure.
{% endhint %}

## Air Filter

| Generation                | OEM Part           | Alternative             |
| ------------------------- | ------------------ | ----------------------- |
| Gen I (Throttle by Cable) | Suzuki 13780-47H10 | K\&N SU-9915            |
| Gen II (Drive-by-Wire)    | Suzuki 13780-48K00 | DNA Filter P-S10GT22-01 |

## Differential

**Recommended:** Royal Purple SAE 75W-140

**Capacity:** 8–10 oz drain and replace (partial) | 16 oz full flush and fill

{% hint style="info" %}
**Pro Tip — Differential Fill**

Clock the diff so drain plugs are at 12 and 3 o'clock. Fill until fluid runs out the side (9 o'clock hole).
{% endhint %}

## Brake Fluid

**Recommended:** AP Racing 600 Racing Brake Fluid

Or use an equivalent **non-synthetic DOT 4** with a dry boiling point in excess of 570°F.

{% hint style="info" %}
Raise the rear of the car as high as possible when bleeding brakes to migrate air out of the master cylinders.
{% endhint %}

## Fuel

Any **91 or 93 octane premium** fuel.

E10/ethanol blends are acceptable for normal use. When storing the car for 2 months or more — especially with an ethanol blend — drain the fuel as completely as possible and refill on the day you will run.

## Coolant

**Recommended:** Distilled water with Red Line Water Wetter

**DO NOT use antifreeze or glycol-based coolants for track use.** Glycol is a safety hazard if spilled on track and is not permitted.

**Capacity:** \~3 gallons when empty

**Cold-weather storage/transport only:** G40 Pink coolant at 20% mix — drain completely and refill with distilled water + Water Wetter before returning to track use.

## Chain Lube

**Recommended:** Maxima Chain Wax

Clean chain before lubing. Use a naphtha-based chain cleaner (Maxima CS75920 or similar) — rinse thoroughly and do **not** let dry on chain before re-lubing.

## Greases & Specialty Lubricants

| Application           | Specification                               | Recommended Product                       |
| --------------------- | ------------------------------------------- | ----------------------------------------- |
| Heim / Rod End Joints | Synthetic Lithium Complex Grease NLGI GC-LB | Lucas Red N Tacky                         |
| Ball Joints           | White Lithium — Low Viscosity               | Dupont Teflon White Lithium PT# D10106601 |
| Body Pins             | White Lithium — High Viscosity              | WD-40 Specialist White Lithium PT# 300240 |
| Control Cables        | Dedicated cable lubricant only              | PJ1 Cable Lube                            |

{% hint style="danger" %}
Use **only** a dedicated cable lubricant on throttle and clutch cables. General-purpose lubricants can damage cable liners.
{% endhint %}

{% file src="/files/cI6pICTq9vVeSUW8rY0F" %}
Original RAW fluid list PDF
{% endfile %}


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