Diesel Engine Oil
Diesel engine oils in a range of viscosity grades, service classifications and base oil types, including heavy-duty and semi-synthetic options.Diesel engine oils in varied grades, classifications and base oil types.
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Fleetmaster CK-4 EXTREME 15W/40 - Hi-Tec Oils
SKU: HI2-2206-0005
Regular priceFrom $64.99Unit price -
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RX Super 15W-40 CJ-4/E9 20L - Castrol
SKU: 3418280
Sale price $193.99 Regular price $203.99Unit price -
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Fleetmaster Euro Plus 10W/40 CK-4 - Hi-Tec Oils
SKU: HI2-2229N-0020
Regular price $264.99Unit price -
VECTON Fuel Saver 5W-30 E6/E9 20L - Castrol
SKU: 3415454
Sale price $405.99 Regular price $426.99Unit price -
VECTON Long Drain 10W-40 E8/E11 5L - Castrol
SKU: 3440105
Sale price $85.99 Regular price $89.99Unit price -
VECTON 15W-40 CK-4/E9 20L - Castrol
SKU: 3413003
Sale price $205.99 Regular price $216.99Unit price -
VECTON Long Drain 10W-40 E8/E11 20L - Castrol
SKU: 3440104
Sale price $246.99 Regular price $259.99Unit price -
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VECTON Long Drain 15W-40 CK-4/E9 20L - Castrol
SKU: 3418174
Sale price $244.99 Regular price $257.99Unit price -
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RX Super 15W-40 CJ-4/E9 7L - Castrol
SKU: 3420723
Sale price $105.99 Regular price $111.99Unit price -
RX Diesel 15W-40 CI-4/E7 20L - Castrol
SKU: 3418225
Sale price $169.99 Regular price $178.99Unit price
Choosing a diesel engine oil
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Start with the required specification
Match the exact manufacturer-required specification for your engine. Viscosity grade alone does not establish an approval, so check the service classification on the label too.
Heavy-duty or light vehicle use
Some oils carry heavy-duty diesel classifications, while others carry classifications used for passenger vehicles. Confirm the intended engine type before choosing.
Base oil and pack size
Semi-synthetic and full synthetic oils are different formulations. Choose the type your handbook calls for, and consider how much you need for the job and future top-ups.

