ACRISS Clarifies Use of “Unspecified Fuel” Codes
To support greater consistency and clarity in the application of the ACRISS Car Classification System, ACRISS has updated the definitions of the “Unspecified Fuel” codes R and N (4th Character – Fuel Type/Air Conditioning).
The revised definitions now explicitly state that these codes are intended for Internal Combustion Engine (ICE) vehicles only. While this has always been the intended application, the additional wording removes any ambiguity and provides clearer guidance for vehicle classification across the industry.
| Fuel/Aircon |
| R |
Unspecified Fuel/Power Combustion Engine Air |
| N |
Unspecified Fuel/Power Combustion Engine No Air |
“Unspecified Fuel” codes are used by car rental companies in their fleet where a specific fuel type cannot be guaranteed and is not known at time of booking (Petrol vs Diesel).
All other fuels still have their own codes including alternatives like Electric (BEV) and Hybrid (HEV and PHEV).
For more information see Expanded Car Classification System
Latest Car Industry News and Trends
/in Envrionmental/by Melanie MethvenIntroducing the latest Car Industry News and Trends as presented by Richard Aucock of Motoring Research September 2026
To access the newsletter click on following link:
ACRISS Car Industry News and Trends
ACRISS Working in Partnership with Tripiamo
/in Envrionmental/by Melanie MethvenACRISS is pleased to announce a new collaboration with Tripiamo, supporting our shared aim of helping travellers feel better informed and prepared when renting and driving a vehicle internationally.
While ACRISS provides trusted industry standards, vehicle classification and rental information, Tripiamo offers practical country-specific driving guides, 360° road simulations and on-the-go resources to help travellers prepare for driving abroad.
Together, ACRISS and Tripiamo are helping to create a clearer, safer and more confident international car rental and driving experience.
Find out more at ACRISS Driving Guides and Tripiamo.
Latest update to ACRISS Car Classification System
/in Envrionmental/by Melanie MethvenACRISS Clarifies Use of “Unspecified Fuel” Codes
To support greater consistency and clarity in the application of the ACRISS Car Classification System, ACRISS has updated the definitions of the “Unspecified Fuel” codes R and N (4th Character – Fuel Type/Air Conditioning).
The revised definitions now explicitly state that these codes are intended for Internal Combustion Engine (ICE) vehicles only. While this has always been the intended application, the additional wording removes any ambiguity and provides clearer guidance for vehicle classification across the industry.
“Unspecified Fuel” codes are used by car rental companies in their fleet where a specific fuel type cannot be guaranteed and is not known at time of booking (Petrol vs Diesel).
All other fuels still have their own codes including alternatives like Electric (BEV) and Hybrid (HEV and PHEV).
For more information see Expanded Car Classification System
New ACRISS Vehicle Selling Guide
/in News/by adminACRISS has updated its popular ACRISS Vehicle Selling Guides and moved it online making it more accessible to all users. Our guides help travel agents, users and renters when booking car rental online by providing a visual aid.
ACRISS Welcomes Navan as its latest Associate Member
/in News/by adminACRISS welcomes Navan as its latest Associate member. We look forward to working with Navan as we broaden our membership base further with Navan’s extensive experience in business travel joining our other associates; GDSs, OTAs and brokers and Car rental members, working together to improve the booking process, improve standards within the industry and increase customer confidence when booking car rental.
ACRISS Welcomes Skyscanner as its latest Associate Member
/in News/by adminACRISS welcomes Navan as its latest Associate member. We look forward to working with Navan as we broaden our membership base further with Navan’s extensive experience in business travel joining our other associates; GDSs, OTAs and brokers and Car rental members, working together to improve the booking process, improve standards within the industry and increase customer confidence when booking car rental.
New Alternative Fuels page on ACRISS website
/in News/by adminACRISS welcomes Navan as its latest Associate member. We look forward to working with Navan as we broaden our membership base further with Navan’s extensive experience in business travel joining our other associates; GDSs, OTAs and brokers and Car rental members, working together to improve the booking process, improve standards within the industry and increase customer confidence when booking car rental.
ACRISS Newsletter Issue 11 – Dec 2024 – Jan 2025
/in News/by adminACRISS welcomes Navan as its latest Associate member. We look forward to working with Navan as we broaden our membership base further with Navan’s extensive experience in business travel joining our other associates; GDSs, OTAs and brokers and Car rental members, working together to improve the booking process, improve standards within the industry and increase customer confidence when booking car rental.