I wanna use amsoil synthetic this winter. i wanna make the switch i currently am using shll rotella t 15w40. Which is better amsoil tbn 15w40 synthetic or 0w40 amsoil syntetic? I live in canada our winters r cold

 

You can also go w/ 5w-40. Not real sure if a straight weight oil is even recommended.

 

Since you are a fellow Canuck....without question use Esso Extra XD3 0W40. Walmart usually has it for $22/4L and you can get it at your local Esso/Mobil distributor as well as many truck stop. It is a true group IV synthetic. I use it all year round as not only does it have awesome cold weather performance but also has great hot weather performance as well.

Esso Extra XD-3 info

 

I used Amsoil Heavy Duty Diesel & Marine 15W-40 year round......

 

I use Amsoil 15W-40 year round, including back home in Alaska where I had NO starting problems to -30. Good stuff for cold temps.

 

Look in your owners manual for the weight. The brand is of very little significance, contrary to what others will say. I believe 5-40 CJ-4 is required for cold temps and 15w40 for regular temps. You see a million stupid threads about brands of oils, they need to be put into a file that says worthless , pointless discusions that don't get resolved.

 

I run the same as the guys posted above. I run the 15w-40 Amsoil year round. Been running that for almost 3 years now and I have not had any cold weather starting problems.

 

It does matter that it is a genuine synthetic, because Amsoil/Royal/Redline/Mobil 1 all will stay pourable down to about -40. Standard petroleum based oils in sub-zero temps dang near turns into a brick in your crankcase. I can say from experience that in -30 temps that Amsoil
15W-40 stays pourable and starting was easy. That's why I use it.

 

thanks guys. so synthetic amsoil tbn 15w40 or regular?

 

amsoil is the way to go

 

I am also from Canada. I use Co-op D-mo SL 0w40. $22.50 for 5L.

 

I use the "Heavy Duty Diesel and Marine" 15w-40.

 

I wonder what the equivalent American version is for Esso Extra XD3 0W40?

 

Amsoil HDD 5w-30, pour point of -50* C
Amsoil AME 15w-40, pour point of -42* C
Amsoil DEO 5w-40, pour point of -44* C

So the HDD has the best pour point, the DEO isn't enough better than the AME to run, considering it is not an extended drain interval oil. The AME is the cheapest of the 3.

 

I use 5W40 Shell Rotela T (full syn) year round, I work northern Alberta, around Zama, Rainbow lake, Steen River, Red Earth Creek and others. Its gets **** cold!! Never had any issues.