Just got email from toyota ireland
We thank you for your letter of the 26th
having had the opportunity to review same, requested our After Sales Department to further review your concerns, and revert to you with our recommendations.
Whilst as you may understand, the owner manuals cover all markets, inclusive of the Nordic countries which experience more extremes cold weather, particularly so in the winter and southern Europe who experience extremes in the summer. The OW8 is certainly the preferred choice of oil in such cases.
Thankfully, our climate is more moderate, and we would not experience the extremes in weather of the Nordic countries e.g. in excess of- 18C and on rare occasions in excess of 27 C, this wide variance of temperature is therefore more suitable to OW8 oil. As Toyota vehicles operating in our market on annual basis are not subjected to such extremes in temperatures, the recommendation for your specific vehicle is to use OW20, as was the case when you had the vehicle recently serviced.
We are pleased to confirm under no circumstances whatsoever would the warranty or future performance of your vehicle be adversely impacted by using the OW20 oil. Please be assured once the vehicle is serviced within the required manufactures schedules, and preferably with the main Toyota dealer network, we are confident you will enjoy many years of Toyota carefree motoring into the future.
Additionally, we have taken the opportunity of speaking with the Service Manager, of your retailing dealer, and confirmed that when your next scheduled service is due, if it is your specific request for the 08W oil to be used, please notify them at the time of booking in the service. they will then use the 08W oil at the next service or indeed future servicing of your vehicle once this is requested in advance / at the time of booking.
We again thank you for your letter and wish you many years of Toyota carefree motoring into the future. Assuring you of our best attention at all
ps i have to say in the 48 years off having toyota cars on and off i have being very happy with them
i am very happy with this result