Engine oil in your Semi ?

[beaverdam]

Just wondering what type of oil, or what viscosity do you guys use in the engine of your Semi?

Do you use something different for the winter months?

Usually run 15w-40, but wondering if there would be a better viscosity to use during winter.

Interested in reading your responses.

[blackpowder]

Remember using synthetic 0w40 up north where you never shut them off for more than a few minutes a month and worked well.
But I think most manufacturers call for a good 15w40 and have been recommended to stick with it.
Cheaper. And we have access to great prestart heaters either 110v or Webasto.
As always, idling kills.

[Guest]

I used a 0W-40 in a 3406 CAT. It ran without fail for years, had to run every week throughout winter. The only time I changed the schedule was if the school buses didn't run, which was usually around -30 plus wind chill. A percolator heater works well if you're not parked in a heated shop between trips. Don't forget to make sure your air dryer is up to snuff unless you have an alcohol injector for your system.

[Partners]

We have a oil pan heater in both of our tandems..15/40 oil...

[blackpowder]

Haven't seen an alcohol sniffer in years. Believe newer air systems are damaged by it.

[blackpowder]

Make sure your pan isn't fibreglass before you put on a pan heater lol.

[zeefarmer]

15W40 in our trucks year round. In the heated shop during the winter.

[seldomseen]

0-40 in mine year round. Just asked the guy that deliver's fuel what they use and that's what he told me. Very expensive oil so I hope it is worth it.

My truck in a shed that's unheated so block heater and pan heater when ever I need to use it.

[farming101]

15/40 Rotella. -36C pour point.
Used to use straight 40 in the old Detroit with an immersion type pan heater. Always went. -13C pour point

[Guest]

0w40 year round , can go longer with it (semi synthetic), have pan heater but don't use it

[helmsdale]

I run 5w40 year round. Rebuilt the engine and broke it in on 5w40, so that's what itll stay on.

15w40 with a pan and block heater is sufficient, or a pan and diesel fired circulating heater will fire in any weather.

[LEP]

Have a C15 Cat that had 0w40 in it when I bought it, so I just continue with that. Year round.

The cummins has 15w40 in it year round. Outside but plugged in or a proheat on when its going to be used.

My brother has a C15 and a detroit. They run 15w40 year round.