Thinning the XD3 0w30...I have to do it.

[userfriendly]

You could always take the oil pan off and install a real oil pump.
I'm using a 50/50 blend of PC 0W30 and SAE 10W in two vehicles this winter.
A very important function of engine oil is to cool internal parts.
Therefore flow is more important than viscosity, or perhaps better stated, an inverse value of high viscosity.

 

[BlazerLT]

Just as an update, no more startup knock detected and the engine does warm up a bit faster.

Really happy and I think I will stick to 3.25 qts XD3 0w30 and a quart of Mobil 1 0w20 for winter use.

full 4.25qt load of XD3 0w30 during the summer though.

 

[BlazerLT]

MAybe the XD3 was really cleaning up this engine seeing this is the first time this oil has been in the truck since I did the Auto-RX treatment.

Interesting to see all the sludge already trapped in the filter only after that few kilometers.

 

[StressSolutions]

I'm in agreement with the feller that said "oil pan heater". The heat will thin the oil for easier starts, decreased viscosity. Of course, there must be a lot I don't understand.....like 0W20 and 0W30 "SHOULD" act the same, since 0w=0w. 20 and 30 are summer numbers, right? Interesting stuff!

 

[BlazerLT]

The one thing you need to know is the 0w is only thinner and capable of lower temperatures than a manufacturers equivelent 5w oil.

For instance Castrol Syntec 0w30 is capable of lower temps than a Syntec 5w30. The ony thing is that you cannot compare a Castrol Syntec 0w30 to a Mobil 1 0w30. They are completely different oils and actually the Mobil 1 5w30 is capable of lower temperature and thinner cold viscosities than a Castrol Syntec 0w30 or even the XD3 0w30 in my truck.

In this thread I used 0w20 seeing it was even thinner at colder temperatures than the 0w30 from Mobil 1 which is why I used it. I wanted maximum thinning for each volume unit used.

I hope this clarifies it a bit for you.