Aspen 4 is a specially-developed alkylate petrol for four-stroke engines. It can be used with a whole array of different four-stroke engines, including lawnmowers, rotary cultivators and snowblowers.
This fuel has been developed in close collaboration with professional users. The collaboration lead to the creation of a fuel with the minimum possible environmental impact and a significantly better working environment for users.
Aspen 4 is largely free of harmful components such as benzene and other aromatic hydrocarbons. It not only provides a better working environment for users, it also minimises harmful emissions, and in doing so keeps the engine cleaner. A cleaner fuel minimises the amount of carbon residue and deposits left on the engine, giving more even and efficient operation. The engine becomes easier to start up, and the fuel can be stored for longer periods.
Unsure if your engine is a two-stroke or four-stroke engine? Check if there’s somewhere to top up the oil, or perhaps a dipstick. If you don't find one of these, it’s a two-stroke engine. Here, you should opt for Aspen 2, an alkylate petrol mixed with oil, developed especially for two-stroke engines.
* Effective from 3 December 2025 * Free delivery on order over €400, applies to Small & Light, Large & Heavy items within zone 1 only.
Zone Indicator:
To help you understand delivery availability, every item displays a zone icon, icons appear on the top-right corner of each product image:
Types of goods
Available zones
Descriptions
Small & light items
All Zone area
Items under 20kg weight & under 2m long, (some fragile items may not be included e.g. glass/mirrors)
Large and bulky items Extra Large items
Zone 1 & 2 only
Wet & hazardous bagged, items over 20Kg weight & oversized; Euronics white goods, TVs of all sizes.
Large Paint items (6L / 6L+)
Zone 1 only
Large hazardous items (6L+) - available for collection
Available zones
Indicator
Descriptions
All zone area
This icon with all zone area in green, indicates this items can be shipped to all Zone.
Zone 1 & 2 only
Zone 1 & 2 in green and zone 3 greyed out, indicates this product can only be shipped to Zone 1 and 2
Zone 1 only
Zone 1 in green zone 2 and zone 3 are greyed out, indicates this product can only be shipped to Zone 1 only.
Old Appliance Collection:
When you buy a large appliance, we’ll collect your old one for free through WEEE Ireland. Please ensure it is uninstalled, disconnected, and ready for pickup. Collection is like-for-like and takes place at the front door or apartment entrance. Restrictions may apply based on access and item type.
At TJ O'Mahony we will exchange or refund any Retail unused product returned to us in its original condition within 30 days of receiving it (*)You can return any unused product to us in its original condition for a full refund or exchange within 30 days of delivery.
This right to return does not apply to products that are non stock and only available to order such as catalogued doors, catalogued bathroomware and mixed paints which are made especially for your order.
Please note that we are unable to accept returns on certain bagged building products and materials, including (but not limited to) hard wall, cement, bonding, slates, and ridges. We appreciate your understanding and recommend checking product requirements carefully before purchase.