The Best Engine Oil Additives
We compared five top-rated engine oil additives based on owner ratings and video reviews. The winner delivers the best balance of performance, cost, and user satisfaction.
Updated
The bottom line
The LIQUI MOLY Cera Tec 20002 is our top pick for the best engine oil additive. With a 4.8/5 rating from 34,597 owners, it reduces wear, improves fuel efficiency, and enhances engine performance. Its compatibility with all motor oils and filter systems makes it versatile. The closest alternative is the Prolube Oil Treatment (B0DVT5763K), which offers similar benefits at a slightly lower price but with fewer owner ratings. For a budget option, the Marvel Mystery Oil Synthetic Motor Treatment (B0D18RMQ44) provides good performance at a lower cost, though with fewer ratings to back it up.
LIQUI MOLY Cera Tec 20002 $28.00
Best overall engine oil additive
The LIQUI MOLY Cera Tec 20002 has a 4.8/5 rating from 34,597 owners, offering superior engine protection and performance. Priced at $28, it's a cost-effective choice. The tradeoff is its smaller volume compared to some competitors, which may require more frequent purchases.
Check price on Amazon
Prolube Oil Treatment $28.99
Strong performance at a lower price
The Prolube Oil Treatment (B0DVT5763K) has a 4.6/5 rating from 3,374 owners and reduces engine noise and wear effectively. Priced at $28.99, it's a strong contender. The tradeoff is the slightly lower number of owner ratings compared to the top pick.
Check price on Amazon
Marvel Mystery Oil Synthetic Motor Treatment $12.34
Affordable with good performance
The Marvel Mystery Oil Synthetic Motor Treatment (B0D18RMQ44) has a 4.8/5 rating from 2,011 owners and provides engine protection and reduces friction. Priced at $12.34, it's budget-friendly. The tradeoff is the smaller number of owner ratings and reviews.
Check price on AmazonThe field, ranked
- LIQUI MOLY Cera Tec 20002 Best for overall engine protection and performance. 9.0/10 $28.00 Amazon
- Prolube Oil Treatment Great value with strong performance. 8.0/10 $28.99 Amazon
- Marvel Mystery Oil Synthetic Motor Treatment Affordable option with good performance. 7.0/10 $12.34 Amazon
- Prolube Oil Treatment Effective but slightly more expensive. 7.0/10 $35.09 Amazon
- Prolube Oil Treatment High-volume option with good reviews but higher price. 6.0/10 $107.99 Amazon
What owners say
Owners of the LIQUI MOLY Cera Tec 20002 frequently mention its effectiveness in reducing engine noise and improving performance. Many note the ease of use and compatibility with their existing motor oil. For the Prolube Oil Treatment (B0DVT5763K), users appreciate the noticeable reduction in engine wear and noise. The Marvel Mystery Oil Synthetic Motor Treatment (B0D18RMQ44) is praised for its affordability and performance, though some users note the need for more frequent purchases due to its smaller volume.
Also-rans
The Prolube Oil Treatment (B0DW3MFN2F) and (B0FH22R2KB) are effective but come at a higher price point compared to the top picks. The (B0DW3MFN2F) is slightly more expensive with similar benefits, while the (B0FH22R2KB) offers a larger volume but at a significantly higher cost, making it less attractive for most users.