Here is the detailed analysis backed by independent test results…
1. Deposit Control: AMSOIL Keeps Your Engine Cleaner
Your engine runs hot, especially if you have a turbocharged vehicle. High temperatures can cause oil to break down, leading to deposit buildup that can reduce performance and shorten engine life.
The TEOST 33C test is an industry-standard method to measure deposit formation in high-heat environments. The lower the deposit level, the better the oil performs.
Independent lab testing results:
- Amsoilsignature series 5w30 synthetic: 7 mg of deposits (the cleanest engine)
- Royal Purple API 5W-30: 25.4 mg of deposits
- Mobil 1 Extended Performance 5W-30: 28.2 mg of deposits
AMSOIL outperformed both competitors, preventing deposits 4X better than Mobil 1 and 3.6X better than Royal Purple. A cleaner engine runs more efficiently, lasts longer, and requires fewer costly repairs.
2. Oil Change Intervals: AMSOIL Lasts the Longest
Nobody likes changing their oil more often than necessary. AMSOIL stands out with the longest recommended oil change intervals, meaning fewer changes and more savings.
- AMSOIL Signature Series: Up to 25,000 miles or one year (normal driving)
- Mobil 1 Extended Performance: Up to 15,000 miles or one year
- Royal Purple: Up to 12,000 miles
For severe driving conditions (towing, stop-and-go traffic, extreme weather, turbo/supercharged engines):
- AMSOIL: 15,000 miles or one year
- Mobil 1 & Royal Purple: Lower intervals than AMSOIL
If you want to change your oil less often while keeping your engine in top shape, AMSOIL is the clear winner.
3. Wear Protection & Performance: AMSOIL Stands Above the Rest
Engines experience constant metal-to-metal contact, especially during cold starts. A good synthetic oil should reduce wear and friction, extending the engine’s lifespan.
- AMSOIL’s advanced synthetic formula creates a stronger lubricating film, reducing friction and preventing wear even under extreme conditions.
- Mobil 1 and Royal Purple also provide decent wear protection, but AMSOIL has been tested to outperform them both in independent industry-standard tests.
- AMS OIL Signature Series offers better viscosity retention, meaning it stays effective longer without breaking down.
If you push your vehicle hard—whether through performance driving, towing, or extreme weather—AMSOIL provides the best protection.
4. Fuel Economy & Cost Savings: AMSOIL Helps You Save More
Because AMSOIL reduces friction and keeps your engine clean, your vehicle runs more efficiently. A cleaner, well-lubricated engine consumes less fuel, saving you money at the pump.
And since AMSOIL lasts longer between oil changes, you’re buying fewer oil changes over time. Even if AMSOIL costs a little more upfront, you save in the long run by reducing maintenance costs.
