# Castrol 2TRatio

> Calculates 2-stroke oil to fuel ratios for various engines. (iPhone/iPad app by Castrol Australia Pty Ltd.)

- Source: https://appshunter.io/ios/app/castrol-2tratio/id812548191 (this page in markdown: same URL + `.md`)
- Developer: [Castrol Australia Pty Ltd](https://appshunter.io/developer/812548194)
- Category: Utilities, Productivity
- Price: Free
- Rating: 3.00/5 from 4 App Store ratings · 31 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 15 MB
- Languages: American English
- Released: 2014-02-09
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/castrol-2tratio/id812548191/reviews.md

## What is Castrol 2TRatio?

Castrol 2TRatio Two Stroke Oil Ratio Selector calculates the oil to fuel ratio for 2 stroke engines

With this handy application, you can quickly and easily calculate the Castrol 2-stroke oil to fuel ratio needed for your 2 stroke engines. 

Applicable for motorcycles, outboard motors, lawnmowers and garden equipment, this calculator determines the amount of oil to add to the fuel required based on the ratio as suggested by the engine manufacturer.
 
To determine the oil required for the fuel needed, simply use the fuel slider to display the amount of fuel needed and use the Ratio Selector slider for the oil to fuel ratio.  The Oil required is instantly displayed for the exact fuel to oil mix.

Under settings, there is a switch between metric or Imperial measurements and a link to the Castrol Lube guide so you can check what oil is right for your engine.

## Key features

- Calculate oil-to-fuel ratio
- Supports motorcycles, outboards, lawnmowers
- Adjustable fuel slider
- Adjustable ratio slider
- Metric/Imperial measurement switch
- Link to Castrol Lube guide

## Recent user reviews (10 of 31)

All indexed reviews: https://appshunter.io/ios/app/castrol-2tratio/id812548191/reviews.md

### 1/5 — Useless

*2019-01-19, version 1.1*

Download page says ver1.1; downloaded app says ver 1.0! Hopeless.

### 1/5 — iOS 11

*2018-10-26, version 1.0*

Don’t work with iOS 11. Please update or I won’t buy your products anymore.

### 5/5 — Please update

*2018-10-05, version 1.0*

Awesome app I used it all the time an till I updated my phone now it won’t work any more please update the app

### 5/5 — App review

*2018-10-03, version 1.0*

App worked really well until my phone updated itself can you please update this app so I can use it again?

### 5/5 — Need update

*2018-09-26, version 1.0*

Perfect app until phone update now it won’t work! Please update this app so I can use it again

### 5/5 — Still waiting for an update.

*2018-07-05, version 1.0*

Perfect app. Please update so we can actually use it again.

### 5/5 — Update please

*2018-05-22, version 1.0*

Please update as I use this all the time boating. Great app

### 4/5 — App update for ios11

*2018-02-24, version 1.0*

Can you update the App for ios11

### 1/5 — App doesn’t work

*2018-02-18, version 1.0*

Please update this handy app so it works with the latest iOS

### 1/5 — Chris

*2018-02-08, version 1.0*

🖕🏿🖕🏿🖕🏿🖕🏿🖕🏿

## Frequently asked questions about Castrol 2TRatio

### What does the Castrol 2TRatio app do?

The Castrol 2TRatio app is a utility tool designed to calculate the correct oil-to-fuel ratio for 2-stroke engines. It helps users determine the precise amount of 2-stroke oil to mix with fuel for various applications.

### What types of engines can I use this app for?

This calculator is applicable for a wide range of 2-stroke engines, including motorcycles, outboard motors for boats, lawnmowers, and other garden equipment. It ensures you get the right mix for optimal engine performance.

### How do I use the app to calculate the ratio?

You can easily determine the oil required by using the fuel slider to set the amount of fuel needed and the Ratio Selector slider to choose the desired oil-to-fuel ratio. The app will instantly display the exact amount of oil to add.

### Does the app support different measurement units?

Yes, the app includes a settings option to switch between metric and Imperial measurements. This allows users to work with the units they are most familiar with for fuel and oil quantities.

### Is there a cost to use the Castrol 2TRatio app?

Based on the provided information, the Castrol 2TRatio app is available for free. There are no in-app purchases or advertisements mentioned, making it a completely free utility for users.

## Version history (last 2 releases)

### 1.1 — 2018-11-05

Updated for latest iOS.

### 1.0 — 2014-02-08

No release notes.

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## Related topics

[castrol 2tratio](https://appshunter.io/ios/topics/castrol-2tratio)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*