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#4 in Synthetic Motor Oil
Amsoil Signature Series 5W-30
Amsoil
$55.00 – $85.00
Amsoil's flagship Signature Series is rated for 25,000 miles or one year and posts 50 percent more film strength than its own XL line. Independent oxidation and wear testing routinely puts it at the top of the synthetic class.
8.7
Excellent
Consensus
Don't buy this if…
- Avoid paying the premium if you lease or follow the factory 5,000-mile schedule - you'll never use the extended-drain headroom.
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