Cold Weather Coming

[NorthernRaider]

Hmmm turns out that PETROL formulations are seasonal as well according to Esso at least

From their PDF

Grade Ex Service Station
W Winter Grade
SIn Intermediate Grade (Spring)
S Summer Grade
AIn Intermediate Grade (Autumn)
16 October to 15 April inclusive
16 April to 31 May inclusive
1 June to 31 August inclusive
1 September to 15 October inclusive

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Bottom bit of doc


Date of issue: 1st February, 2009
I.S. EN 228: 2004 Sulphur Free Gasoline
Property Min Max Units Test Method
Appearance Clear and Bright Visual Inspection
Density (at 15oC) 720 775 kg/m3
EN ISO 3675
EN ISO 12185
Octane No. Research Method (4) 95.0 95.9 prEN ISO 5164
Octane No. Motor Method (Note 4) 85.0 85.9 prEN ISO 5163
Lead Content - 5 mg/l prEN 237
Doctor Test Neg IP 30
Copper Corrosion (3 Hrs @ 50oC) Class 1 Rating EN ISO 2160
Existent Gum Content
(Solvent Wash)
- 5 mg/100ml EN ISO 6246
Sulphur content - 10.0 mg/kg
EN ISO 20846
EN ISO 20884
Oxidation Stability 360 - mins EN ISO 7536
Olefins content - 18.0 % v/v
ASTM D 1319
prEN 14517
Aromatics content - 35.0 % v/v
ASTM D 1319
prEN 14517
Benzene content - 1.00 % v/v
EN 12177
prEN 14517
EN 238
Oxygen content - 2.7 % m/m
EN 1601
EN 13132
Oxygenates content:
- methanol
- ethanol
- iso-propyl alcohol
- iso-butyl alcohol
- tert-butyl alcohol
- ethers (5 or more C atoms)
- other oxygenates
-
-
-
-
-
-
-
3.0
5.0
10.0
10.0
7.0
15.0
10.0
% v/v
EN 1601
EN 13132
Date of issue: 1st February, 2009
I.S. EN 228: 2004 Sulphur Free Gasoline
Property Min Max Units Test Method
Distillation: EN ISO 3405
% Evaporated at 70oC (E70)
Summer (Class B) 20.0 48.0 % v/v
Transition (Class B Min, F1 Max) 20.0 50.0 % v/v
Winter (Class F) 22.0 50.0 % v/v
% Evaporated at 100oC (E100) 46.0 71.0 % v/v
% Evaporated at 150oC (E150) 75.0 - % v/v
Final Boiling Point - 210 OC
Distillation residue - 2 % v/v
Vapour Pressure (VP) (Note 1) EN 13016-1
Summer 45.0 70.0 kPa
Transition 45.0 100.0 kPa
Winter 70.0 100.0 kPa
Vapour Lock Index: 10*VP+7*E70
Transition (Note 2) - 1,250
Notes:
1. The Summer, Transition and Winter specifications refer to products available ex
Refinery jetty and loading rack in the following periods:
Summer Grade: 01st June – 31st August.
Transition periods: 16th April – 31st May and 1st September – 15th October.
Winter Grade: 16th October – 15th April.
2. The vapour pressure (VP) and % evaporated at 70oC (E70) may vary between the above
limits during the transition periods, to comply with Vapour Lock Index (VLI) maximum.
3. This specification is in accordance with the directive 2003/17/EC and meets or exceeds
EN 228: 2004.
4. Republic of Ireland Sales: Requirement of Finance Act 1997 – Octane in unleaded petrol.
Specification may exceed maximum limit on one of either RON or MON.