Originally Posted By: fordman65
Hello kind sir,
You obviously didn’t read my entire post.
I most certainly did, I simply took issue with that one little point, which is why I only quoted it.
Originally Posted By: fordman65
First post back in over 2 years.
Why did I leave this forum for 2 years ?
Due to the petty, nit picking that happens.
Well, welcome back. It wasn't petty nit-picking, but clarification as to what the number in front of the W indicates.
Originally Posted By: fordman65
I stated it was just my non scientific opinion.
Read below...
In my honest (non scientifc) humble opinion.
You have the thin 0W with the protection of 40.
Plus if it is a long drain oil.
Yes, I read that and corrected it. I understand it is your opinion, however it was worded as being categorically wrong (0W doesn't denote thin, it denotes the ability to pass the CCS and MRV requirements at -35C and -40C respectively) and I politely offered a revised version of the statement that read properly.
Originally Posted By: fordman65
The 0W the oil flows very well at 0F.
In my non scientific mind that tells me it would flow well at normal operating temperatures.
I mean BMW,Mercedes,Porsche, Audi.
They ought to know a little more than me or anyone else.
Those companies specify that oil in Europe for a lot of cars.
0F is roughly -18C.
0W-xx denotes passing of CCS/MRV at -35C/-40C
5W-xx denotes passing of CCS/MRV at -30C/-35C
10W-xx denotes passing of CCS/MRV at -25C/-30C
15W-xx denotes passing of CCS/MRV at -20C/-25C
20W-xx denotes passing of CCS/MRV at -15C/20C
So your 0F threshold is roughly the cranking limit for the 15W-xx designation. So 15W-xx, 10W-xx, 5W-xx and 0W-xx are all suitable for use at that temperature and will have no undue impact on cranking speed, and all will pump (MRV).
The 0W-40 and 0W-30 grades specified by European OEM's are for their broad base of coverage, working basically anywhere in the world and it is an excellent choice. My Grand Cherokee also calls for a 0w-40.