What I said was, in winter, I use 5W 50 (the engine thinks it has 5
weight in it when cold).

Mike

David Kao wrote:
> Mike, did you mean to say the other way around? Or am I understanding oil
> viscosity incorrectly? But I agree with you that when cold 20w-50 has a weight
> of 20 and 50 at engine's operating temperature. What I have question about
> is the 20 weight when cold. Especially in winter isn't it too thick? I think
> you answered the question already.
>
> David
>
>
> --- Mike Collum <collum@verizon.net> wrote:
>
>> David,
>>
>> When it's cold the engine "Thinks" it has 20 weight in it and when it
>> warms up the engine "Thinks" it has 50 weight in it.
>>
>> During the winters in northern Maine I use 5w 50.  The engine would
>> never turn over, when it's below 0� F, using 20w 50.
>>
>> Mike
>>
>>
>>
>> David Kao wrote:
>>> Bob, what is your opinion about dino oil 20w-50 most Vanagon people
>>> believe in and kind of insist in using it? They have of course a good
>>> point that the owner's manual suggested it.
>>>
>>> My understanding is the 20W part is bad for the first few miles after a
>>> cold start in the morning. That's when the most wear happens to the engine.
>>> But the number of 50 in 20w-50 is good for the rising coolant temperature
>>> when in bumper to bumper traffic. The Vangon's cooling system is unable
>>> to keep the coolant at a constant temperature in slow traffic or in climbing
>>> long hills, unlike my Passat which keeps its coolant temperature at a
>>> constant at all conditions. I can see the benefit of the 50 viscosity
>>> for vanagons. But 20w part is really bad for cold start and first few
>>> miles of driving first thing in the morning.
>>>
>>> What's the solution for this? What's your opinion about this? Or it doesn't
>>> matter any way? Thanks a lot.
>>>
>>> David
>>>
>>>
>>>
>>>
>>>
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>
>
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