Castrol Classic XL30

Castrol Classic XL30 is a premium SAE30 monograde oil.  Formulated with high quality mineral oils, plus carefully selected additives, it is ideally suited to older technology and classic car engines.

•For pre-1950 veteran, vintage & classic cars

•A high quality SAE 30 monograde engine oil

•Also used in most types of manual gearboxes fitted to vintage and classic cars (see hyperlinked chart below)

•Specified for pre-selector type gearboxes (such as Wilson)

•Offers excellent cold temperature starting and improved oil pressure at high operating temperatures

• ZDDP (Zinc) levels are 800-1000ppm. Zinc is corrosive and high levels will cause wear to cams etc. It can also cause problems in vehicles that are in storage as it makes the oil acidic.
• The reason Zinc levels got VERY high for a period of time was to counter the effect of lead scavengers which reduced its effectiveness, but there is no lead in petrol now and hence no scavenger additive – this is why some people still associate with very high Zinc being ‘right’ for classic cars.
• GM experimented with levels in the 1950’s and found 800-1000ppm was optimum for wear protection. They also tested down to 600ppm in the ‘70s and found no wear issues.
• This oil at 800-1000ppm is also suitable for cars with catalytic converters

Available sizes:  1 Liter (1.05 quarts)
                                 5 Liters (5.28 quarts), and
                                20 liters (21.13 quarts)

• Accepting Pre-Orders.  Shipping in April 2025.

How many liters of motor oil does my classic need?

Engine and Transmission Oil Type & Quantity Chart (hyperlink)

The above hyperlink will give you quantity in pints (don't ask me why).  To convert to liters, take the pint quantity and divide by 1.76 for approximate liters

Pints / 1.76 = Liters

Want more information?  Click on the links below:

Why use Specialty Oils in your Classic Car?

A Deep Dive into the right oil for YOUR car.

Want more?  A Deeper Dive...