GR Corolla/Amsoil 0w-20 oil temp questions..

[kschachn]

As I've said, I never planned on doing it. I've tested both viscosities to see what my engine liked and how it worked with both viscosities. The ow-20 is what is recommended, I wanted to see if 5w-30 or even 0w-30 was a better option. This is where Lake Speed Jr said let's test them both and see what the actual numbers say. Doing research on this website can take some time and doesn't happen overnight.

If that is what he said then it is a large and odious load of nonsense.

 

[kschachn]

So you know more than Lake???,perhaps you should contact him with some of your questions instead of just undermining him. and keep us posted on the possible answers. so, a learning process can occur.

When someone states you can rank a motor oil by adding up the "wear metals" from random spectrographic analyses then I have a hard time listening to anything else. Mr. Marketing Degree is full of it here and it represents a truly fundamental misunderstanding of science.

 

[Klutch9]

No. The oil doesn't care what the weather is. Only the xW figure matters for startup. Otherwise, just no.
You should do some research on this website.

In some engines, outside temp absolutely does make a difference. The oil in my Explorer runs significantly cooler in the winter than it does in the summer, with the same driving habits. It has no oil/coolant heat exchanger, fwiw.

 

[4wd]

When science meets YouTube speculation …

 

[CleanSump]

Marketeer vs Chemists and Engineers on the subject of Scientific method. Nothing is stopping you, but you aren't going to convince the professionals it is meaningful.

 

[CleanSump]

In some engines, outside temp absolutely does make a difference. The oil in my Explorer runs significantly cooler in the winter than it does in the summer, with the same driving habits. It has no oil/coolant heat exchanger, fwiw.

Then you have a cooling system problem. Why is it either overcooling in Winter or not cooling properly in Summer?

 

[Patman]

Because the engine controls the oil temp, not Mother Nature. She's busy trying to halt fake cheese and margarine from being sold in Wisconsin.

Not all engines are quite like this though. I’ve said this before, there is a difference in oil temperature in my Corvette between a cold winter day and a hot summer day. If I go on a long highway drive in the winter and I’m cruising along at 70 mph the oil temperature never goes above 180, but that exact same drive on an 80-90 degree day and I see oil temperatures in the 200-210F range. Not a huge amount but also not insignificant either.

And I don’t have a cooling system problem like you stated above because other C7 owners have reported the same thing and I also saw the same thing with my C5 and C6 Corvettes.

 

[Klutch9]

Then you have a cooling system problem. Why is it either overcooling in Winter or not cooling properly in Summer?

Cooling system works fine. Coolant comes up to temp fast in any season. But the oil is not tempered/controlled by any sort of heat exchanger like many newer cars have. So the outside temp against the oil pan surface area keeps the bulk temp much cooler in the winter.

 

[tired]

Not all engines are quite like this though. I’ve said this before, there is a difference in oil temperature in my Corvette between a cold winter day and a hot summer day. If I go on a long highway drive in the winter and I’m cruising along at 70 mph the oil temperature never goes above 180, but that exact same drive on an 80-90 degree day and I see oil temperatures in the 200-210F range. Not a huge amount but also not insignificant either.

And I don’t have a cooling system problem like you stated above because other C7 owners have reported the same thing and I also saw the same thing with my C5 and C6 Corvettes.

May all be true, but I don't see how switching viscosities between winter and summer offers any advantage. There's never a time when I can see having a lower viscosity offers any benefit.

 

[facility1]

May all be true, but I don't see how switching viscosities between winter and summer offers any advantage. There's never a time when I can see having a lower viscosity offers any benefit.

Is this just a opinion?

 

[tired]

Is this just a opinion?

No. I'm unaware of any technical reason for a benefit created from switching to a lower grade oil in the winter when you have an adequate winter rating.

 

[kschachn]

No. I'm unaware of any technical reason for a benefit created from switching to a lower grade oil in the winter when you have an adequate winter rating.

It’s a carryover from about 1960.

 

[Patman]

May all be true, but I don't see how switching viscosities between winter and summer offers any advantage. There's never a time when I can see having a lower viscosity offers any benefit.

I agree, especially when there is 0w-30 ESP readily available, as it gives you easy starting in the coldest possible winter mornings but has the nice 3.5 HTHS for extra cushion when the oil temperatures are at their highest

The only time I can see it being a thing is if someone has a huge stash of both 0w-20 and 5w-30 and they wanted to use one in the summer and one in the winter in order to use it up before switching to the 0w-30