Wmo mix ratios for winter

[bagpiperjosh]

i guess I know very little about gas, because i didnt know there was a winter blend....

yea, that's new to me too.

 

[Blind Driver2]

i guess I know very little about gas, because i didnt know there was a winter blend....

That's one reason why fuel prices go down this time of the year.

 

[Brad S.]

I've heard that the blend on gas for winter has to do with evaporation.
The summer blend has stuff in it that doesn't evaporate as easy, winter blend is the opposite.
I suppose it depends on your location, cold or warm climate that is.
Just heard this in passing.

 

[kerrynzl]

That's going to be 85% WMO and 15% Gas. The gas is what helps bring the viscosity down to a level that's about the same as diesel. It also has anti-gelling properties that'll keep the oil from thickening up.

Gasoline is used purely as thinning agent [ a cheap one at that ]

There is generally no Anti-gelling properties in winter blend gasoline

Winter blends have a higher proportion of shorter chain Hydrocarbons [ at the butane end of the scale ] The side effect is that it is more volatile [ higher vapour pressure ]

There is also winter blend Diesel to. It is closer to D1 in chemical properties. With Diesel [ D2 ] there is parrafins added for pump lubrication, this is what plugs filters in cold temps [ CFPP ] "Cold filter plugging point"
Winter blend diesels can have anti gelling agents added

Multi grade Motor oils should never plug or thicken up at low temperatures,
Most multi grades oils start out as LOW Viscousity oils ,then have polymers [ viscousity index improvers ] added to handle higher temperatures.

The term "weight" is often misused, it is actually the temperature operating range.
The same goes with the term viscousity! it is actually "Viscousity Index" which is measured over a range of temperatures.

Scientifically speaking, raising the temperature doesn't alter the viscousity index [even though flow is vastly improved ]
The flow is measured over a range of temperatures and is then rated with a viscousity index.

 

[leswhitt]

Gasoline is used purely as thinning agent [ a cheap one at that ]

There is generally no Anti-gelling properties in winter blend gasoline



Multi grade Motor oils should never plug or thicken up at low temperatures,
Most multi grades oils start out as LOW Viscousity oils ,then have polymers [ viscousity index improvers ] added to handle higher temperatures.

I would respectfully disagree;

1) Winter blend gasoline does have anti-gelling properties when mixed with diesel fuel. Gasoline "thickens" at a much lower temp than diesel so anytime you mix gas with diesel, you lower the "thickening" point of the diesel. I realize I'm using incorrect scientific terms but it makes it easier to visualize. To put it even more simply, both summer and winter blend gas are to diesel what anti-freeze is to water.

2) Multi-grade motor oils definitely flow slower at lower temps and without debating scientific terms, the normal person would say it's because it's thicker. As you heat it up, it thins out and flows easier. This is why parking lots in colder climates have plug-ins to help keep the oil warm in the block.

 

[Blind Driver2]

Gasoline is used purely as thinning agent [ a cheap one at that ]

Cheap? Seriously?

There is generally no Anti-gelling properties in winter blend gasoline

Wrong.

Winter blends have a higher proportion of shorter chain Hydrocarbons [ at the butane end of the scale ] The side effect is that it is more volatile [ higher vapour pressure ]

There is also winter blend Diesel to. It is closer to D1 in chemical properties. With Diesel [ D2 ] there is parrafins added for pump lubrication, this is what plugs filters in cold temps [ CFPP ] "Cold filter plugging point"
Winter blend diesels can have anti gelling agents added

Multi grade Motor oils should never plug or thicken up at low temperatures,

Yes they do. Ever try to add a quart of oil into a engine at -10*?


Most multi grades oils start out as LOW Viscousity oils ,then have polymers [ viscousity index improvers ] added to handle higher temperatures.

The term "weight" is often misused, it is actually the temperature operating range.
The same goes with the term viscousity! it is actually "Viscousity Index" which is measured over a range of temperatures.

Scientifically speaking, raising the temperature doesn't alter the viscousity index [even though flow is vastly improved ]
The flow is measured over a range of temperatures and is then rated with a viscousity index.

Viscosity.