ACEA A7 B7-21

ACEA A7/B7 oils are High Sulphated Ash, Phosphorus, Sulphur (SAPS) lubricants. They are designed for use in high performance gasoline and light duty diesel engines that are designed to be capable of using a low viscosity oil. These oils may be unsuitable for use in some engines. 

ACEA A7/B7 oils are typically low HTHS (2.9 - 3.5cP) based on API Group III base oils. The main physical and chemical requirements for ACEA A7/B7 are shown below: 

Requirement Method Unit Limit
HTHS viscosity CEC L-36-90 cP ≥ 2.9 and ≤ 3.5
Sulphated Ash ASTM D874 %m/m ≤ 1.6
Phosphorus ASTM D5185 or
ASTM D4951
%m/m Report
Sulphur ASTM D5185 or 
ASTM D4951
%m/m Report
Evaporation loss (NOACK) CEC L-40-93 % ≤ 13
Total Base Number ASTM D2896 and
ASTM D4739
mgKOH/g Report ≥ 6.0

OEM approvals which are planned to be aligned to this category are currently unclear, but it is anticipated that the new category will be beneficial to those focusing on Low Speed Pre-Ignition (LSPI) protection and Turbo Charger cleanliness, creating a high-performing high SAPS category.

By ACEAs own definition if a new test significantly changes the performance requirements of a category then a new category must be introduced. The creation of ACEA A7/B7 builds on the requirements and updates of ACEA A5/B5, with the introduction of three new performance tests:

Test Additional engine tests above A5/B5-21
CEC L-114-19  Toyota Turbocharger Compression Deposits (diesel) 
ASTM D8291 Sequence IX Low Speed Pre-Ignition GDI Turbo
ASTM D8291 Sequence X Chain Wear GDI