Synthetic Motor Oil

Compare AMSOIL's synthetic motor oil lines — engineered for maximum protection, fuel efficiency, and extended drain intervals across all passenger vehicle applications.

AMSOIL Extended-Life 100% Synthetic Motor Oil | 20,000-Mile Protection

AMSOIL Extended-Life Synthetic Motor Oil delivers up to 20,000-mile drain intervals. Resists oil breakdown, protects against LSPI, and keeps engines clean. Available in 5 viscosities.

0W-20 5W-20 5W-30 10W-30 10W-40

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AMSOIL Signature Series 100% Synthetic Motor Oil | Advanced Protection

AMSOIL Signature Series provides 75% more engine protection against wear. Extended drain intervals up to 25,000 miles. Available in 8 viscosities.

0W-20 5W-20 0W-30 5W-30 10W-30 0W-40 5W-50 0W-16

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