Engine Oils

Find the right outbard engine oil for any boat

Marine engines require other oils than passenger cars or motorcycles. Due to their longer time of staying, engine oils need specific additives and need to perform well under high engine performances. As with other oils, it needs the choice between synthetic, semi-synthetic and mineral oils. For the oil selection it needs the control of the required engine oil. Never use a synthetic one if a mineral oil is permitted. In common, all outboard engines need a high viscosity oil. That counts for 2-stroke as for 4-stroke outboarders.

What does ACEA A3/B4 mean?

ACEA A3/B4 engine oils are often 5W-30, 5W-40 or 10W-30 oils that are usually targeted at modern passenger car gasoline and diesel models from various manufacturers.

ACEA A3/B4 5W-30 and 5W-40 engine oils are usually based on API Group III base oils, while ACEA A3/B4 10W-40 engine oils often contain both Group I, Group II and Group III base oils.

For the ACEA A3/B4 specification, an HTHS viscosity greater than or equal to 3.5 cP is required.

Since 2004, the European ACEA (Association des Constructeurs Européens d'Automobiles) has continued to develop the ACEA A3/B3 specification and revise its requirements:

• ACEA A3/B4-21
• ACEA A3/B4-16
• ACEA A3/B4-12
• ACEA A3/B4-10
• ACEA A3/B4-08
• ACEA A3/B4-07
• ACEA A3/B4-04

Which viscosity for ACEA A3/B4 engine oil?

Which viscosity you can use in connection with the ACEA A3/B4 viscosity, depends strongly on your vehicle and/or the installed engine. In the vehicle manual of your car you will find a detailed description of how you should select your engine oil.

In the online store of ATO24 you will find ACEA A3/B4 oils of various viscosities. Hereunder are among other things:

• ACEA A3/B4 0W-30
• ACEA A3/B4 0W-40
• ACEA A3/B4 5W-30
• ACEA A3/B4 5W-40
• ACEA A3/B4 5W-50
• ACEA A3/B4 10W-30
• ACEA A3/B4 10W-40
• ACEA A3/B4 10W-50
• ACEA A3/B4 10W-60

If you are not sure which viscosity to use for your vehicle, just ask! The ATO24 team will be happy to help you quickly and competently to find exactly the right engine oil for you!

ACEA A3/B4 with approval / recommendation for Mercedes, BMW, Ford, Volvo, Renault etc.

In the ATO24 store you will receive engine oils that, in addition to the specification, also receive various manufacturer releases or manufacturer recommendations. Often specification and release occur together to narrow down the compatible selection of engine oils for you and make your search easier. Here you will find engine oils that also receive the following manufacturer recommendations and approvals:

• Mercedes-Benz MB 229.5 ACEA A3/B4 oil
• Ford WSS-M2C917A ACEA A3/B4 oil
• GM dexos2 ACEA A3/B4 oil
• Renault RN0700 ACEA A3/B4 oil