Why Choose Synthetic Lubricants
Synthetic oils are engineered for uniform molecules and tailored additives. The result is stronger film strength, cleaner operation, and stability in extreme heat and cold. AMSOIL pioneered synthetics for cars in 1972 and continues to publish performance data so you know what you’re getting.
Key Advantages vs. Conventional Oil
| Benefit | Synthetic Advantage | Why It Matters |
|---|---|---|
| Wear protection | Uniform molecules build a durable film that separates metal surfaces. | Helps prevent horsepower loss and component wear. |
| High‑temperature control | Resists oxidation and deposits in hot turbo and ring zones. | Keeps parts cleaner to maintain performance. |
| Cold‑start flow | Superior low‑temperature pumpability. | Oil reaches parts faster where most wear occurs. |
| Volatility | Lower tendency to evaporate under heat. | Helps reduce oil consumption and deposits. |
| Service life | Formulated for extended drains as specified by the product. | Fewer changes and less downtime; always follow label guidance. |
Always use the viscosity and specification your owner’s manual requires.
What Makes Synthetic Oil Different
- Base oils: Chemically engineered molecules deliver a higher viscosity index and stronger film than conventional refined oils.
- Additives: Detergents, dispersants, anti‑wear, anti‑oxidants and friction modifiers are balanced to protect modern engines, including turbocharged and direct‑injected designs.
- Consistency: Tighter molecular distribution improves cold flow and deposit control compared to conventional oil.
Learn more: Synthetic vs. Conventional
How to Pick the Right Oil
Use the AMSOIL Product Guide for exact viscosity and spec matches for your vehicle.
Why AMSOIL
- First synthetic motor oil to meet API service requirements in 1972.
- Signature Series provides 75% more engine protection against horsepower loss and wear vs. the industry standard and is guaranteed for up to 25,000 miles or 1 year (normal service).
- Guards turbochargers, exceeding the GM dexos1 Gen 2 turbo deposit requirement by 72% in industry testing.
- AMSOIL publishes performance testing and backs products with a warranty that supports your right to choose the lubricant brand you prefer.
See: Performance Tests and AMSOIL Guarantee
Service Life & Oil Analysis
Follow the product label for drain intervals and verify with oil analysis if operating under severe or extended conditions.
FAQ: Synthetics, Service Life and Fit
Is synthetic oil safe for new or high‑mileage engines?
Yes. Synthetic oils are safe for both. Use the viscosity and specifications your manufacturer requires.
How long can I go between oil changes?
It depends on the product and operating conditions. AMSOIL Signature Series is guaranteed for up to 25,000 miles or 1 year in normal service; severe service may shorten that interval. Always follow the label and verify with oil analysis when extending intervals.
Will synthetic oil void my warranty?
No. U.S. federal law protects your freedom to choose the brand of lubricants; keep receipts and follow required specs and intervals.
Do I need to flush before switching?
No special steps are required for most vehicles. An engine flush can be used if sludge is suspected.
Ready to Protect Everything You Drive
Notes: Always follow the product label and owner’s manual. Extended drains may require oil analysis depending on use.