FUELS
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Internet: www.iisnl.com   Proficiency testing schemes
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FUELS PROFICIENCY TESTS
         
GASOIL
Proficiency Testing Scheme Provisional Scope * ID of PT Final registration date Sample dispatch date
AdBlue (32% Urea solution) Tests from the ISO22241-1 profile and other tests. iis25G05 25 April 2025 7 May 2025
Biodiesel B100 The regular sample (iis24G07) is for tests from the EN14214 and ASTM D6751 profiles and other tests.

Separate samples can be ordered for:
- Cetane Number (Engine-test) and Derived Cetane Number (iis24G07CN)
- Metals (iis24G07M)
- Total Contamination (iis24G07TC)
iis24G07 13 September 2024 25 September 2024
iis24G07CN 13 September 2024 25 September 2024
iis24G07M 13 September 2024 25 September 2024
iis24G07TC 13 September 2024 25 September 2024
Biodiesel B100 As UCOME NEW! The regular sample (iis25G03) is for tests from the EN14214 and ASTM D6751 profiles and other tests.

Separate samples can be ordered for:
- Metals (iis25G03M)
- Total Contamination (iis25G03TC)
- Cold Soak Test / Filter Blocking Tendency (iis25G03CST).
iis25G03 28 March 2025 9 April 2025
iis25G03M 28 March 2025 9 April 2025
iis25G03TC 28 March 2025 9 April 2025
iis25G03CST 28 March 2025 9 April 2025
Biodiesel B100 As RME The regular sample (iis25G07) is for tests from the EN14214 and ASTM D6751 profiles and other tests.

Separate samples can be ordered for:
- Cetane Number (Engine-test) and Derived Cetane Number (iis25G07CN)
- Metals (iis25G07M)
- Total Contamination (iis25G07TC)
- Cold Soak Test / Filter Blocking Tendency (iis25G03CST)
iis25G07 26 September 2025 8 October 2025
iis25G07CN 26 September 2025 8 October 2025
iis25G07M 26 September 2025 8 October 2025
iis25G07TC 26 September 2025 8 October 2025
Iis25G07CST 26 September 2025 8 October 2025
Diesel B10 (10% FAME) The regular sample (iis25G04) is for tests from the EN16734 and ASTM D7467 profiles and other tests.
Separate sample can be ordered for:
- Total Contamination (iis25G04TC)
iis25G04 25 April 2025 7 May 2025
iis25G04TC 25 April 2025 7 May 2025
Gasoil - ASTM (winter) The regular sample (iis24G06ASTM) is for tests from the ASTM D975 profile and other tests.

Separate samples can be ordered for:
- Cetane Number (Engine-test) and Derived Cetane Number (iis24G06CN)
- Total Contamination (iis24G06TC)
- Oxidation Stability (iis24G06OX)
iis24G06ASTM 16 August 2024 28 August 2024
iis24G06CN 16 August 2024 28 August 2024
iis24G06TC 16 August 2024 28 August 2024
iis24G06OX 16 August 2024 28 August 2024
Gasoil - ASTM (winter) The regular sample (iis25G06ASTM) is for tests from the ASTM D975 profile and other tests.

Separate samples can be ordered for:
- Cetane Number (Engine-test) and Derived Cetane Number (iis25G06CN)
- Total Contamination (iis25G06TC)
- Oxidation Stability (iis25G06OX)
iis25G06ASTM 15 August 2025 27 August 2025
iis25G06CN 15 August 2025 27 August 2025
iis25G06TC 15 August 2025 27 August 2025
iis25G06OX 15 August 2025 27 August 2025
Gasoil - EN (summer) The regular sample (iis25G01EN) is for tests from the EN590 profile and other tests.

Separate samples can be ordered for:
- Cetane Number (Engine-test) and Derived Cetane Number (iis25G01CN)
- Total Contamination (iis25G01TC)
- Oxidation Stability (iis25G01OX)
iis25G01EN 10 January 2025 22 January 2025
iis25G01CN 10 January 2025 22 January 2025
iis25G01TC 10 January 2025 22 January 2025
iis25G01OX 10 January 2025 22 January 2025
Gasoil (premium) The regular sample (iis25G02) is for tests from the EN590 profile and other tests.
Separate sample can be ordered for:
- Total Contamination (iis25G02TC)
iis25G02 7 March 2025 19 March 2025
iis25G02TC 7 March 2025 19 March 2025
Hydrotreated Vegetable Oil (HVO100) Test from the EN15940 profile and other tests. iis25G09 16 May 2025 28 May 2025
Vacuum Gasoil (VGO) The regular sample (iis24G08) is for tests from the ISO8217 profile and other tests.
Separate sample can be ordered for:
- Metals (iis24G08M)
iis24G08 25 October 2024 6 November 2024
iis24G08M 25 October 2024 6 November 2024
Vacuum Gasoil (VGO) The regular sample (iis25G08) is for tests from the ISO8217 profile and other tests.
Separate sample can be ordered for:
- Metals (iis25G08M)
iis25G08 31 October 2025 12 November 2025
iis25G08M 31 October 2025 12 November 2025
 
GASOLINE
Proficiency Testing Scheme Provisional Scope * ID of PT Final registration date Sample dispatch date
Aviation Gasoline Tests from the ASTM D910 and Def Stan 91-090 profiles. iis25B02 21 March 2025 2 April 2025
Biogasoline E10 The regular sample (iis25B04) is for tests from the EN228 profile and ASTM D4814 profile and other tests.
Separate samples can be ordered for:
- TVP / DVPE (iis25B05DVPE)
- RON / MON (iis25B05RON)
iis25B04 2 May 2025 14 May 2025
iis25B04DVPE 2 May 2025 14 May 2025
iis25B04RON 2 May 2025 14 May 2025
Gasoline - ASTM (summer) The regular sample (iis25B01ASTM) is for tests from the ASTM D4814 profile and other tests.
Separate samples can be ordered for:
- TVP / DVPE (iis25B01DVPE)
- RON / MON (iis25B01RON)
iis25B01ASTM 14 February 2025 26 February 2025
iis25B01DVPE 14 February 2025 26 February 2025
iis25B01RON 14 February 2025 26 February 2025
Gasoline - EN (winter) The regular sample (iis24B06EN) is for tests from the EN228 profile and other tests.

Separate samples can be ordered for:
- ASVP / DVPE (iis24B06DVPE)
- RON / MON (iis24B06RON)
- RON 91 (iis24B06R91)
iis24B06EN 30 August 2024 11 September 2024
iis24B06DVPE 30 August 2024 11 September 2024
iis24B06RON 30 August 2024 11 September 2024
iis24B06R91 30 August 2024 11 September 2024
Gasoline - EN (winter) The regular sample (iis25B06EN) is for tests from the EN228 profile and other tests.

Separate samples can be ordered for:
- ASVP / DVPE (iis25B06DVPE)
- RON / MON (iis25B06RON)
iis25B06EN 5 September 2025 17 September 2025
iis25B06DVPE 5 September 2025 17 September 2025
iis25B06RON 5 September 2025 17 September 2025
Gasoline (premium) The regular sample (iis25B03) is for tests from the EN228 profile and ASTM D4814 profile and other tests.
Separate samples can be ordered for:
- ASVP / DVPE (iis25B03DVPE)
- RON / MON (iis25B03RON)
iis25B03 4 April 2025 16 April 2025
iis25B03DVPE 4 April 2025 16 April 2025
iis25B03RON 4 April 2025 16 April 2025
 
FUEL OIL
Proficiency Testing Scheme Provisional Scope * ID of PT Final registration date Sample dispatch date
Fuel Oil The regular sample (iis24F03) is for tests from the ISO8217 and ASTM D396 profiles and other tests.

Separate samples can be ordered for:
- Metals (iis24F03M)
- Bromine Number and P-value, P-ratio and Separability number (iis24F03Br)
- Compatibility in accordance to ASTM D4740 (iis24F03C)
iis24F03 8 November 2024 20 November 2024
iis24F03M 8 November 2024 20 November 2024
iis24F03Br 8 November 2024 20 November 2024
iis24F03C 8 November 2024 20 November 2024
Fuel Oil The regular sample (iis25F01) is for tests from the ISO8217 and ASTM D396 profiles and other tests.
Separate sample can be ordered for:
- Metals (iis25F01M)
- Chemical Species ASTM D7845 (iis25F01P)
iis25F01 13 June 2025 25 June 2025
iis25F01M 13 June 2025 25 June 2025
iis25F01P 13 June 2025 25 June 2025
Fuel Oil The regular sample (iis25F03) is for tests from the ISO8217 and ASTM D396 profiles and other tests.

Separate samples can be ordered for:
- Metals (iis25F03M)
- Bromine Number and P-value, P-ratio and Separability number (iis25F03Br)
- Compatibility in accordance to ASTM D4740 (iis25F03C)
iis25F03 14 November 2025 26 November 2025
iis25F03M 14 November 2025 26 November 2025
iis25F03Br 14 November 2025 26 November 2025
iis25F03C 14 November 2025 26 November 2025
 
JET FUEL
Proficiency Testing Scheme Provisional Scope * ID of PT Final registration date Sample dispatch date
Jet Fuel A1 The regular sample (iis24J02) is for tests from the DEF STAN 91-091 and Joint Fuelling System Check List and other tests.

Separate samples can be ordered for:
- BOCLE (iis24J02BOCLE)
- Particle Size Distribution (iis24J02PS)
- FAME (iis24J02FAME)
- JFTOT (iis24J02JF)
- Particulate Contamination (iis24J02CP)
iis24J02 2 August 2024 14 August 2024
iis24J02BOCLE 2 August 2024 14 August 2024
iis24J02PS 2 August 2024 14 August 2024
iis24J02FAME 2 August 2024 14 August 2024
iis24J02JF 2 August 2024 14 August 2024
iis24J02CP 2 August 2024 14 August 2024
Jet Fuel A1 The regular sample (iis25J01) is for tests from the DEF STAN 91-091 and Joint Fuelling System Check List and other tests.
Separate sample can be ordered for:
- Particle Size Distribution (iis25J01PS)
iis25J01 24 January 2025 5 February 2025
iis25J01PS 24 January 2025 5 February 2025
Jet Fuel A1 The regular sample (iis25J02) is for tests from the DEF STAN 91-091 and Joint Fuelling System Check List and other tests.

Separate samples can be ordered for:
- BOCLE (iis25J02BOCLE)
- Particle Size Distribution (iis25J02PS)
- FAME (iis25J02FAME)
- JFTOT (iis25J02JF)
- Particulate Contamination (iis25J02CP)
iis25J02 1 August 2025 13 August 2025
iis25J02BOCLE 1 August 2025 13 August 2025
iis25J02PS 1 August 2025 13 August 2025
iis25J02FAME 1 August 2025 13 August 2025
iis25J02JF 1 August 2025 13 August 2025
iis25J02CP 1 August 2025 13 August 2025
 
* To see the actual scopes of all previous PTs, you may be interested to download the available PT reports from our webpage 'News and Reports'.
 
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