Shopping.co.uk

Castrol GTX Semi Synthetic 15W40 A3/B3 Engine Oil - 1 Litre - 14F7DC

Castrol GTX Semi Synthetic 15W40 A3/B3 Engine Oil - 1 Litre - 14F7DC

Castrol GTX 15W40 A3/B3 Engine Oil is engineered to maintain a pristine engine and prolong the lif...

Best current price£15.98from Demon Tweeks

Best offers

Shopping.co.uk recommended and popular offers

All Offers

11 offers from £15.98 - £56.42

View price history by clicking the chart icon.

Demon TweeksCastrol GTX 15W40 A3/B3 Engine Oil - 15W40, 1 litre Bottle
£7.94 delivery
£15.98
Visit shop
eBay1 x 1 Litre - Castrol GTX Semi Synthetic 15W40 A3/B3 Engine Oil
Free delivery in 1–3 days
£16.03
Visit shop

Product Information

Full details

Castrol GTX 15W40 A3/B3 Engine Oil is designed for vehicle owners who prioritize engine longevity and cleanliness through advanced lubrication. Its primary benefit is the 3X-Clean formula, which proactively removes and prevents harmful sludge and deposit buildup caused by heat and contaminants. While highly effective for engine maintenance, users should note that this specific viscosity and specification must be checked against their vehicle owner's manual to ensure compatibility with their engine's unique requirements.

All features

Model Part Number14F7DC
BrandCastrol

Extended Product Information

FAQs

Is Castrol GTX 15W40 synthetic?

This product is a semi-synthetic formulation designed to balance performance and protection.

Can I use this oil in a diesel engine?

Yes, the A3/B3 specification covers certain diesel engines. Always verify the B3 requirement against your owner's manual before use.

How often should I change this oil?

Follow the oil change interval recommended by your vehicle manufacturer's maintenance schedule.

Does this oil help with high mileage engines?

Yes, its ability to remove sludge and deposits is particularly beneficial for high-mileage engines that have accumulated buildup over time.

Can I mix this with other engine oils?

While it is technically possible to mix, it is highly recommended to use the same brand and type to maintain the integrity of the 3X-Clean formula.

Troubleshooting

Oil pressure warning light remains on after change

Check oil level with the dipstick to ensure proper fill and verify the oil filter is installed correctly and not leaking.

Engine feels sluggish or runs hotter than usual

Verify the 15W40 viscosity is approved by your vehicle manufacturer; using a weight that is too thick can increase internal resistance.

Pros and Cons

Pros

  • Significantly reduces sludge and harmful deposit buildup
  • Provides reliable wear protection for critical engine parts
  • Effective at maintaining performance during short, stop-start trips
  • Engineered to withstand high-heat operating conditions

Cons

  • Specific 15W40 viscosity may not be suitable for all modern engines
  • Requires verification against manufacturer specifications
  • Limited to 1-litre sizing which may not cover full oil change capacities

Setup, Compatibility & Care

Before adding Castrol GTX 15W40 to your vehicle, consult your owner's manual to confirm that your engine requires a 15W40 weight and an A3/B3 specification oil. Adding the incorrect viscosity can lead to reduced fuel efficiency or inadequate lubrication.

When performing an oil change:

  1. Ensure the engine is warm but not hot.
  2. Drain the old oil completely into a suitable container.
  3. Replace the oil filter with a fresh unit.
  4. Refill with the recommended volume of Castrol GTX 15W40.
  5. Check the dipstick to ensure the oil level is between the minimum and maximum markers.

Always dispose of used motor oil at a designated recycling center to prevent environmental contamination.

Price History

DatePrice
Visit shop