DIY Synthetic Oil Change | AMSOIL Synthetic Lubricants
NEW AMSOIL Preferred Customer Program

It's Fall Oil Change Time


For those of us who love taking care of our vehicles, falling leaves and dropping temperatures signal the time for an oil change. Prepare your vehicle for winter with AMSOIL Signature Series Synthetic Motor Oil. Its superior performance helps you take engine protection to the next level. While you’re at it, become an AMSOIL Preferred Customer today and save. Outstanding protection for your vehicle and perks for you. What’s not to love about fall?

Fall Oil Change Time

Expert Vehicle Maintenance Tips


Boat Ready for Storage




Lawn Mower


Dirt Bike Tire Change


Sharpening your Chainsaw Blade


Changing the Oil in Your Snowmobile

Look up your car or truck

AMSOIL Signature Series Synthetic Motor Oil

  • 75% more engine protection against horsepower loss and wear than required by a leading industry standard*, extending the life of vital components like pistons and cams.
  • A 92.5% better piston deposit score.*
  • Oil thickening limited to 82 percent below the standard*.

*As required by a leading industry standard. Based on independent testing of AMSOIL Signature Series 5W-30, in ASTM D7320 as required by API SN specification.

Shop Now See the Proof

Beats Mobil 1® and Royal Purple® in
Industry-Standard Testing*

Signature Series 5W-30 Synthetic Motor Oil protects against harmful deposits on turbochargers 4X better than Mobil 1 Extended Performance and 3.6X better than Royal Purple in industry-standard testing.*

*Based on independent, third-party testing of AMSOIL® Signature Series 5W-30, Mobil1® Extended Performance 5W-30 and Royal Purple® API 5W-30 in the ASTM D6335 bench test required by the API SN Resource Conserving specification.

Have You Become an AMSOIL Preferred Customer?

  • Exclusive Promotions
  • Save up to 25% on Every Order
  • Earn Points Redeemable on Future Orders
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