Automotive cleaning additive designed to remove sludge and varnish from oil-lubricated systems, WYNNS Engine Oil Flush. Cleaner internals reduce wear and quieten noisy lifters, giving greater confidence on the road. Is a pre-change flush necessary for modern engines or mainly useful for older, high-mileage units?
⚡ At a Glance
- • Cleaning Performance: High-detergency action dissolves sludge, varnish and suspended contaminants for effective removal
- • Best for: DIY mechanics and workshops preparing for an oil change who need internal deposit removal
- • Not ideal for: Engines with no internal deposits where a flush would add little benefit
Powerful cleaning agents break down varnish and sludge rapidly. Compatible with mineral and synthetic oils and suitable for low SAPS applications.
Deep internal cleaning – with a high-detergency formula
High-detergency chemistry penetrates oil-lubricated systems and dissolves varnish, sludge and carbon, suspending particles so they can be drained away during an oil change.
Cleaner oil passages restore lubrication flow and reduce friction, which helps improve engine efficiency and reduce wear on moving parts.
Restores movement of stuck components – with deposit-dissolving agents
Active ingredients target deposits around piston rings, lifters and oil passages, breaking down residues that cause sticking and restricted movement.
Freed components return to normal operation, reducing rough idling and improving responsiveness after the oil change.
Quiets noisy hydraulic lifters and protects internals – with acid-neutralising action
Neutralising compounds counteract acids formed by combustion and degraded oil while cleaning removes the build-up that causes lifter noise.
Reduced lifter ticking and lower corrosion risk contribute to smoother running and longer component life.
✨ The 4 Key Reasons for WYNNS Engine Oil Flush
- High-detergency formula – Speeds up cleaning so oil change removes more contaminants
- Acid-neutralising agents – Reduces corrosive by-products to protect metal surfaces from long-term exposure
- Multi-system compatibility – Safe to use in engines, gearboxes and differentials
- Simple application – Easy to add before an oil change for workshop or DIY use
📋 Technical Details at a Glance
- Category: Automotive additive, engine oil flush
- Brand: WYNNS
- Capacity: 425 ml
- Application: Internal cleaning for engines, hydraulic systems, gearboxes and differentials
- Main actions: Dissolves varnish, sludge and contaminants
❓ Frequently Asked Questions
Q: Can the flush be used with synthetic oils?
A: Compatible with both mineral and synthetic oils, including single and multigrade formulations, and suitable for low SAPS applications.
Q: Will it help with noisy hydraulic valve lifters?
A: Quietens noisy hydraulic valve lifters by removing the sludge and carbon that cause sticking, and neutralises acids that can worsen noise.
Q: Can it be used in gearboxes or differentials?
A: Formulated to clean engines, hydraulic systems, gearboxes and differentials internally, allowing contaminants to be suspended and removed at the oil change.
🏆 Our Verdict
Suitable for DIY mechanics and workshops preparing vehicles for an oil change, especially where buildup or lifter noise is present. Deep-cleaning, high-detergency action dissolves sludge and neutralises acids while remaining compatible with mineral and synthetic oils. Cost-effective maintenance that helps protect fresh oil and prolong engine life, delivering long-term value through reduced wear.
