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piper6909 · 02-03-2021, 10:41 AM

Forgive me for reviving an old thread, but I didn't want to start 'another oil thread.'

So it's time for an oil change and I'm having a hard time finding the recommended (According to the manual for my climate, both above and below 50 degrees F.) 10w-40 grade in Mobil-1.

I know that now Porsche recommends 5w-50, but I didn't see any charts based on climate, and I find it hard to believe it's good for all climates, especially not for below 50 degrees F.

From my research on here I've seen people using 0-40, 10-30, 5-50, and other grades, some of which aren't even listed in the manual. Why such a variety of preferences when the manual seems quite specific?

Nonetheless, since 10w-40 is harder to find, am I safe using 5w-40, which is more readily available?

Thanks in advance!

02-03-2021, 10:41 AM	#37
piper6909 Registered User Join Date: Jan 2019 Location: PA Posts: 1,724	Forgive me for reviving an old thread, but I didn't want to start 'another oil thread.' So it's time for an oil change and I'm having a hard time finding the recommended (According to the manual for my climate, both above and below 50 degrees F.) 10w-40 grade in Mobil-1. I know that now Porsche recommends 5w-50, but I didn't see any charts based on climate, and I find it hard to believe it's good for all climates, especially not for below 50 degrees F. From my research on here I've seen people using 0-40, 10-30, 5-50, and other grades, some of which aren't even listed in the manual. Why such a variety of preferences when the manual seems quite specific? Nonetheless, since 10w-40 is harder to find, am I safe using 5w-40, which is more readily available? Thanks in advance! Attached Images __________________ 2002 Boxster Base - Arctic Silver - Tiptronic 2010 Subaru Forester 1980 Ford C-8000 Custom Cab Emergency-One Fire Truck __________________ "I never lose. I either win or I learn." -Nelson Mandela Last edited by piper6909; 02-03-2021 at 10:49 AM.