Devon Aygo has recently supplied the following information on oil requirements:
"The issues over which oils are used is caused by a European law called "Block exemption" the same law that states that manufacturers can't insist on main dealer servicing, also stops Toyota from insisting what oils are used by anyone wishing to service a car including their own dealer network. All Toyota are allowed to do is list a set of specifications that the oil used must meet they can also list a "preferred" oil. For example I have listed below the requirements Toyota have for the mkiii Prius, a car that has caused a lot of posts over the oils that have been used during servicing. This info is taken from Toyota's Service data sheet for European Prius mkiii only!
Preferred option:
0w20
Other listed options:
5w20
5w30
10w30
15w40
20w50
These grades above are listed by Toyota as they meet the following required specifications:
API grade SL or SM multigrade engine oil
API grade SL “Energy-Conserving”. SM “Energy-Conserving” or ILSAC* multigrade engine oil.
Toyota can only require the oils used meet the minimum specifications above. So long a the oil used meets the above the oil grade is not enforceable.
At present Toyota have "asked" but cannot enforce the dealer network to use the following,
MK4 Yaris & Yaris Cross 0W8 - Meeting JASO GLV-1
New Models introduced in 2019 such as Corolla Hybrid, Rav4 Hybrid, C-HR Hybrid & Facelift Prius & Aygo use 0w16 - Meeting API SN
Auris, C-HR & Corolla 1.2T 0w20 AFE Extra - Meeting API SN Plus / ILSAC GF-5
2019 Supra 0w20 ( there is a Supra Specific grade for this ) - Meeting API SN ACEA C5
GR Yaris 4wd 0w20 AFE Extra - Meeting API SN Plus / ILSAC GF-5
MK3 Prius, Prius plug-in, Prius +, Mk1 Auris HSD, Mk2 Auris HSD, MK3 Yaris HSD & C-HR HSD >2019 0w20 - Meeting API SN / ILSAC GF-5
Mk1 & Mk2 Prius 5w30 - Meeting API SN ACEA C2
Optimal drive petrol models 0w20 - Meeting API SN Plus / ILSAC GF-5
Other petrol engines 5w30 - Meeting API SN ACEA C2
Diesel engines incl Optimal drive 5w30 - Meeting API SN ACEA C2
Diesel engines with DPF/DPNR including optimal drive 0w30 or 5w30 - Meeting API SN ACEA C2
1.6 1WW Auris, Avensis & Verso & 2.0 2WW Avensis & Rav4 ( BMW ) 5w30 meeting API SN ACEA C3 BMW LL04
1.5, 1.6 & 2.0 Proace & Proace City ( PSA ) 5w30 meeting ACEA C2 PSA B71 2312
2022 on Hilux 2.4/2.8 GD engine 0W20 PFE - Meeting ACEA C5
