Porche Dealer in Toronto

[boxsternut]

Jaykay...it IS a -ve in front of the 25C. It's below in F as well. That's why I'm contemplating switching to 5W40. Will have to keep Autoselect in mind if I need something done that I can't do. Newmarket is only 1/2 hour drive for me in Caledon.

[boxsternut]

This is the wording directly from our owner's manual (I have it on PDF).

Engine Oil Recommendation
Recommended oil viscosity ranges dependent on ambient temperatures
Ambient temperature seasonal SAE Viscosity Range engine oils
generally above -13°F (-25°C ) SAE 0W-40, 5W-40, 5W-50 approved by Porsche
generally below -13°F (-25°C ) SAE 0W-40 approved by Porsche

The 'generally below-13F(-25C)' is the interesting point. Although it does list above -13F the three viscosities, it makes the special note regarding 0W40 for the lower general temperature. We store for the winter and operate in the warmer months, so I can't see why 5W-40 can't be used.

[jaykay]

Wow I am going to ask Porsche about this one. Why on earth are service shops and the dealer keep putting in 0W???? I would think this would be way too low on the viscosity index for anybody but a winter driver. I am a bit freaked out as I have always used 0W..

I will get a manual for myself!

Thanks...

[boxsternut]

One reason might be that 0W40 is harder to find and more expensive...more people might just opt for the dealer to do the service!!!!$$$$$

[jaykay]

it seems that the intent of lightweight oil was to reduce lifter noise on start-up........