Generator Engine Oil – Diesel 3kVA to 20kVA

£24.99 inc. VAT (£20.83 excl. VAT)

7 in stock

The best Oil for diesel Generators

  • 1 litre of Rock Brand 15W-40 Engine oil suitable for most diesel generators from 3 to 20kVA.
  • Specially selected by Hampshire Generators to match or exceed all oil performance grades required in small 3000 rpm or 1500 rpm diesel generators.

the best diesel generator engine oil

1 litre of Rock Brand 15W-40 Engine oil suitable for most diesel generators from 3 to 20kVA.

A range of premium quality part-synthetic oils that have been specifically developed to meet the requirements of EURO 3, 4 & 5 engines that are not fitted with a Diesel Particulate Filter.

This level of performance is required to meet the new requirements for soot handling performance. Defined within both the ACEA and API latest diesel categories, as well as OEM performance requirements.


  • Extremely high specification diesel engine oils also having gasoline automotive engine performance.
  • The oils are formulated to contain detergent, dispersant, anti-wear, corrosion and oxidation inhibitors which provides the maximum engine protection possible.

Performance Specifications / Approvals:

API CI-4/CF/SLACEA E7 MACK EO-M Plus VOLVO VDS VDS-2 VDS-3 MAN 271 & M3275 MB 228.1/228.3

MTU Types 1 &2 RVI RLD Cummins 20071/72/76/77/78 Caterpillar ECF-1 Global DLD-1 DLD-2 DHD-1

Specially selected by Hampshire Generators to match or exceed all oil performance grades required in small 3000 rpm and 1500rpm Diesel Generators

Please check your handbook for specific grade required for your brand of generator.


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When will I receive my order?

In most cases, a product on our website will give you an indication of the current stock availability, but shipping is not uniform for all products. We maintain fantastic relationships with all of our suppliers and we aim to get products to customers within 3 business days of the order being taken. This availability is based on information from our suppliers and from sales and supply patterns. The availability information given is a guide only and not a guarantee as there are external factors that we may not have control over.

Coronavirus Update – UK couriers and transport companies will not currently guarantee delivery times and we are seeing a slight delay in deliveries – please bear this in mind when ordering.

1500rpm machines or larger diesel gensets however are typically priced on application and all depend on the destination. We will be happy to quote on any large diesel generator and discuss your needs over the phone or via email.

Most orders placed before 12pm on a business day will be shipped from our suppliers on the same day provided the product is in stock. If you need to be certain an item is in stock and available, or if you need a lead time, it’s worth calling our sales team on 01329 722390. Pricing for extended shipping areas like Northern Ireland, the Scottish Highlands and outlying Islands, Outer Hebrides, Channel Islands, Isle of Man, Scilly Isles, and other postcodes not considered as UK mainland can be obtained also by calling our offices.

Please note that the processing of a payment and acknowledgement email does not constitute a legally binding contact. In the case of mispricing, changes in stock quantity, or if we believe the machine will be misused, we reserve the right to cancel the order and provide a full refund.

Heavy Items

You will be contacted by phone after ordering a larger item to confirm a delivery date before your order is dispatched. Large or heavy items are dispatched through a pallet network, so if we can’t get in contact with you, we may be unable to send out your item on a next day delivery. Please be sure to include a working phone number with your order.

Heavy items will require the recipient to make arrangements to take delivery of the goods and may require the recipient to help the courier unload the item. For items that are delivered on a pallet the courier will leave the pallet as close to your door as possible.

1500rpm diesel generators will require forklift (or similar) offloading; if this is not available then we can arrange a Hiab offload at an additional price – please call us to discuss any delivery requirements.


Generator Engine Oil – Diesel 3kVA to 20kVA