Jun 7, 2024 · It is not recommended to mix engine oil and gear oil as they have different viscosities and additives designed for specific purposes. Mixing them can affect the …

Jan 5, 2026 · This comprehensive mixing gear oil and engine oil guide will explain exactly why these fluids aren’t friends and what to do if you’re ever forced to make that tough call.

Sep 22, 2024 · In short, it is generally not recommended to mix gear oil with engine oil. While some gear oils and engine oils may share similar base oils, they have different additive …

Jan 9, 2024 · Automobile experts suggest that it is a bad idea to mix gear oil with engine oil. Though you will add a small amount of gear oil on the engine oil to avoid damage, it should be …

Jul 2, 2025 · Using engine oil in your gearbox can lead to a cascade of problems, ultimately compromising the transmission’s performance and lifespan. Engine oil and gear oil are not …

Dec 23, 2025 · The short answer to whether you can mix gear oil with engine oil is a definitive no for modern vehicles. While both are petroleum-based lubricants, they are engineered for vastly …

Nov 23, 2025 · In this detailed guide, you will learn why mixing gear oil and ATF is risky, what actually happens inside your vehicle, symptoms of mixing, and how to fix the damage the right …

Dec 17, 2023 · Yes, you can mix synthetic gear oil with regular gear oil without any combustion or harm to your engine. However, the conventional oil may limit the performance of the synthetic oil.

Sep 14, 2022 · Gear oil is designed to lubricate and protect the gears in a gearbox, while engine oil is designed to lubricate and protect the internal components of an engine. Mixing these oils …

Jun 28, 2009 · I asked the exact question to the Valvoline tech support people. They said no. gear oil doesn't work like that. The additive packs are completely different.