This document explores the use of 2-stroke oil as a fuel additive in Toyota Prado D4D diesel engines, specifically those with Denso common rail systems. The information presented is a compilation of experiences and opinions from various users.
Problem
Owners of D4D engines, particularly those with Denso common rail systems, have reported issues such as injector failure and cold start rattle. Some believe that modern low-sulfur diesel fuels lack the necessary lubricity to protect these components.
Solution
Some users have experimented with adding 2-stroke oil to their diesel fuel to increase lubricity and potentially mitigate injector issues.
- Dosage: A common ratio is approximately 250:1 (diesel to 2-stroke oil). An example is 1dl of 2T oil to 30L of diesel fuel.
- Oil Type: It is generally recommended to use mineral-based 2-stroke oil, not synthetic or outboard oil.
- Application: This practice is more commonly considered for D4D engines manufactured between approximately 2005 and 2012, which utilize Denso common rail systems.
Important Considerations:
- Injector Fouling: One study suggests that fuel injector fouling is a possible risk when using 2-stroke oil in diesel.
- DPF Concerns: The same study suggests that emissions could “likely” affect modern diesel engines equipped with a Diesel Particulate Filter (DPF).
Relevant Parts/Substances
- 2-Stroke Oil: Mineral-based, non-synthetic. Example: Gulf Western.
- Diesel Fuel
Disclaimer
The information presented is based on user experiences and opinions. The effectiveness and potential risks of using 2-stroke oil as a fuel additive may vary. It is crucial to conduct thorough research and consider potential impacts on your vehicle’s warranty and emissions systems before implementing this practice.
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