

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Cyprus.
⚙️ Drive smarter, not harder — unlock your engine’s hidden potential!
Mannol Motor Doctor 9990 is a premium 300ml engine oil additive designed to restore oil pressure, reduce oil consumption, and minimize exhaust smoke. Its viscosity stabilizer enhances oil film strength for smoother cold starts and less engine wear, making it ideal for high-mileage petrol and diesel engines using any oil type. This multifunctional treatment extends engine life and improves overall performance, perfect for professionals who demand reliability and efficiency.






| ASIN | B00ZPO6UFK |
| Best Sellers Rank | #641,329 in Automotive ( See Top 100 in Automotive ) #1,955 in Motor Oils |
| Brand Name | MANNOL |
| Container Type | Can |
| Customer Reviews | 4.5 4.5 out of 5 stars (219) |
| Item Form | Liquid |
| Item Weight | 308 Grams |
| Liquid Volume | 300 Milliliters |
| Manufacturer | Mannol |
| Unit Count | 10.14 Fluid Ounces |
| Warranty Description | see manual |
E**Z
Excellent product
I swear by this product. Used both in my BMW 528 and my wife's VW Touareg.
D**A
El motor sigue consumiendo aceite
C**É
alles gut
M**N
Ik heb een oudere auto met heel wat kilometers op de teller. Door slijtage was er frictie tussen verschillende motoronderdelen. Ik deed een blikje Mannol in het oliereservoir terwijl de motor nog warm was en sindsdien voel en hoor ik het verschil. Door de hogere viscositeit verbruikt de wagen nu ook beduidend minder olie.
G**A
Todo perfecto llegó a tiempo. A ver en un tiempo su función .
W**Y
تحت التجربة _المنتج وصل كما ف الصور..سعر جيد..شكرا امازون .. التوصيل سريع
J**R
Just like the Mannol diesel (fuel) additive,the product is brilliant.Added to sump oil in a 1.6 hdi Peugeot engine of around 87000 vintage,the immediate difference was impressive,engine was smooth before but even quieter with the Mannol additive.Rgarding ratio I just introduced it with a 3.5 litre oil change,(total fluid including filter) and 1600 miles later the oil is noticeably clearer than before,ie not blackening within the first 100 miles post-change.Before the oil change I used Mannol engine flush as it's the only one you can safely drive for around 50 miles while it's in circulation,and that certainly left the engine interior very clean prior to renewing sump oil.Possibly due to using these Mannol products,I'm not certain,but in the 5 years I've had my car ,mostly urban runs,traffic etc with little motorway use,it's averaged 40mpg at best,38mpg mostly,and that was on premium/regular diesel mixed,but since feeding it's systems with the Mannol diet that mileage has shot up to a sustained 50+ mpg,and that's with heavy trailer use,town runs etc,absolutely brilliant stuff,I would recommend Mannol to anyone,especially at the Amazon prices and delivery etc.
Trustpilot
3 weeks ago
3 days ago