Product Category Search
Top rated automotive engine and oil fluid additives
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Best overall
Lucas Oil 2500 Heavy Duty Anti-Engine Wear Treatment
A high-performance additive that reduces wear and extends engine life, especially under heavy loads.
- Excellent wear protection
- Improves oil film strength
- May darken oil color
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Best high-mileage pick
Liqui Moly 5W-30 Cera Tec Engine Oil Additive
Ceramic-based additive that reduces friction and improves fuel efficiency in high-mileage engines.
- Reduces friction
- Boosts fuel economy
- Higher price point
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Best budget pick
STP Oil Treatment 5W-30
A cost-effective additive that cleans deposits and restores oil viscosity for older engines.
- Affordable
- Cleans deposits
- Less effective on severe wear
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Best performance pick
Royal Purple Max-Care Motor Oil Additive
Synthetic-based formula that enhances oil stability and provides superior protection at high temperatures.
- High temperature stability
- Improves oil life
- May be overkill for routine maintenance
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Best cleaning pick
Sea Foam Motor Treatment
Versatile treatment that removes sludge, reduces emissions, and protects engine components.
- Versatile cleaning
- Reduces emissions
- Strong odor
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Best fuel system pick
BG 44K Super Fuel System Cleaner
Designed for gasoline engines, it cleans fuel injectors and combustion chambers, improving performance.
- Cleans injectors
- Restores power
- Not needed for diesel engines
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