Site traffic information and cookies

We use cookies (and equivalent technologies) to collect and analyse information on our site's performance and to enable the site to function. Cookies also allow us and third parties to tailor the ads you see when you visit our site and other third party websites in the same online network, including social networks. By clicking 'Agree', you agree to these uses of cookies. If you do not agree or if you would like more information, you can manage your cookie preferences by clicking the link provided.

Manage cookie preferences

IT'S MORE THAN JUST OIL. IT'S LIQUID ENGINEERING.

  1. Home
  2. CAR ENGINE OIL & FLUIDS
  3. ENGINE OILS
  4. ENGINE OIL VISCOSITY GRADES
  5. 10W-40

10W-40

If your car needs a 10W-40 engine oil Castrol offers a range of options that flow like a 10 Weight oil when the engine is cold and a 40 Weight oil when up to normal operating temperature.

CHOOSE THE BEST 10W-40 OIL FOR YOUR ENGINE

Castrol offers a broad range of 10W-40 engine oils, including  premium full synthetic, high mileage and conventional, meeting the needs of both drivers and vehicle manufacturers.

Castrol MAGNATEC 10W-40

Castrol MAGNATEC’s unique formulation protects from the moment you start, dramatically reducing* engine wear. Now with ultra refined molecules, for protection you can see, hear and feel.