Oil weight

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Waterboy

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I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?
 

Travelin Ram

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I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?
Told by whom? Clearly someone who does not understand oil viscosity ratings.

5W is thinner than 10W for cold starts.
The operating temperature warmed up is the same regardless of where you’re driving.
 

06 Dodge

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I have a 2020 2500 Ram. Owned it two years. I have ran T6 5w-40 since I bought it. Living in the south with temps over 100. Moved too IL. Now being told 5w-40 is to thick and should be running 10w-30. Which is the best weight to run year round?
Who ever told you that is an idiot 5w is thinner then 10w that first number is what counts in the winter not the second number... Their is a chart that shows what oil to use at what temps, but right now I can't find it to post :(
 

jejb

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Who ever told you that is an idiot 5w is thinner then 10w that first number is what counts in the winter not the second number... Their is a chart that shows what oil to use at what temps, but right now I can't find it to post :(
This. And synthetics tend to have a much better low temp pour point than non-synthetics. I'd stay with the T6 5W-40, personally.
 
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Waterboy

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I was told that info at the dealer, when I took it in to fix the trans recall. The owners manual calls for 10w-30 with temps down to zero then it calls for 5w-40 for temps below zero. I will stick with 5w-40. Sure do miss my 2013 2500.
 
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