Nomad Willy
Guru
At times I have mixed 30w and 40w Delo. Usually less than 50-50 as in one quart 40w and 3quarts 30w. For summer use.
But now I am considering mixing 10-30 and 20-50. If the viscosity is linear up and down the scale as one changes vis I think one would come up w 15-40. But I don’t know if this is a linear function.
If 15-40 lube oil is readily available in 15-40 for gasoline road vehicles I’ll be good to go but I don’t think it is. However it would be handy for many of us to mix what viscosity we wanted relative to the variables at hand like low temps and flat land or high temps and mountainous roads. I don’t think 15-40 is available for gas engines. I wonder why but if one can mix per above anyone can mix up 15-50.
Mixing would mostly happen as I mentioned above .. like adding a quart of a different vis. Doing this the vis wouldn’t change enough to need numbers .. IMO. If you have a car in Wash state and the owners manual recommends 5-30 oil from Cali to Wn and in Wn the recommended vis is at max vis (per owners man) just adding a quart of lowest vis per manual should be safe and bring the oil vis up or down to a more desirable overall vis. No need for linear info either.
So is there any chemists aboard that know if one can mix and achieve these vis numbers in a linear way? And as usual I’m open to opinions.
But now I am considering mixing 10-30 and 20-50. If the viscosity is linear up and down the scale as one changes vis I think one would come up w 15-40. But I don’t know if this is a linear function.
If 15-40 lube oil is readily available in 15-40 for gasoline road vehicles I’ll be good to go but I don’t think it is. However it would be handy for many of us to mix what viscosity we wanted relative to the variables at hand like low temps and flat land or high temps and mountainous roads. I don’t think 15-40 is available for gas engines. I wonder why but if one can mix per above anyone can mix up 15-50.
Mixing would mostly happen as I mentioned above .. like adding a quart of a different vis. Doing this the vis wouldn’t change enough to need numbers .. IMO. If you have a car in Wash state and the owners manual recommends 5-30 oil from Cali to Wn and in Wn the recommended vis is at max vis (per owners man) just adding a quart of lowest vis per manual should be safe and bring the oil vis up or down to a more desirable overall vis. No need for linear info either.
So is there any chemists aboard that know if one can mix and achieve these vis numbers in a linear way? And as usual I’m open to opinions.
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