Question 1

What does the viscosity code on engine oil mean, such as 5W-30?

Accepted Answer

The first number (5W) indicates cold start behavior, how low the temperature can be while the oil still flows properly on a cold start. The second number (30) describes viscosity at operating temperature. The higher the second number, the thicker the film when hot.

Question 2

How often should I change engine oil?

Accepted Answer

Follow the schedule in your manual. With modern vehicles on a longlife service interval, this is often based on the onboard computer. With short city trips or intensive use, change more frequently than the maximum interval states.

Question 3

Can I mix two different engine oils?

Accepted Answer

In an emergency you can top up with a compatible oil of the same viscosity class, but never mix as standard practice. Different additive packages can react with each other and reduce protective properties. Do a full oil change as soon as possible.

Question 4

What grease should I use for brake caliper sliders?

Accepted Answer

Use only dedicated brake grease or copper paste on the guide pins and contact surfaces of the brake caliper. Standard lithium grease or multi-purpose grease is not heat-resistant enough and can attack rubber.

Question 5

What is the difference between fully synthetic and semi-synthetic engine oil?

Accepted Answer

Fully synthetic oil consists entirely of chemically processed base oil and offers better protection at extreme temperatures, longer service life, and lower friction. Semi-synthetic is a mix of mineral and synthetic base oil, cheaper, but less stable under high loads.

Question 6

Can I use lubricant on ball joints and steering joints?

Accepted Answer

Only if the ball joint has a grease nipple. Sealed ball joints are lubricated for life by the manufacturer. If the seals are damaged, you replace them, you don't top up the grease.

Engine Oil & Lubricants

No products found

Frequently asked questions

Shop

Shop

Engine Oil & Lubricants

No products found

Frequently asked questions