which oil for my engine

[jared1]

i just bought a new 2012 and was told thast they put 10w30 in these things, my last truck was my 2000 with the 7.3 and i am used to using 15w40. i just changed my oil for the first time and put 15w40 but i want to know if that was a smart move or a terrible one. thanks guys

[fordpwrstroke7]

What part of the country are you in? 5w40 is probably the most preferred and will make the motor start easier and run a little smoother. If you're in a cold climate though with extreme lows, you should probably stick with what you have right now. Rotella T6 is what I use if you go with 5w.

[jared1]

i live in louisiana. down here the lowest it usually gets is in the 40-50s and it doesnt stay there long. our weather changes day to day. sometimes we get in the 20s but it doesnt really get colder than that.

[fosterelli]

I use 15W-40 (Castrol Tection) here in Houston.

["Stroker 8"]

I use 10w-30 since day 1 here in Ohio and haven't had any issues yet.

[fordpwrstroke7]

If you're in Louisiana, I'd run 5w40 all year long. You have the same climate as me.

[dslbrnr]

Rotella T-5 10-30. If I start doing some heavy towing i'll use the T-6 5-40.

[bob650]

Originally Posted by fordpwrstroke7

If you're in Louisiana, I'd run 5w40 all year long. You have the same climate as me.

5W40 is for colder climates. Not an issue in LA. Stick with 15W40 if you need a 40W.

[fosterelli]

^^ agree...no reason to have a large-spread multi-grade like 5W-40 unless your conditions require it...

[DAT]

Rotella T 15-40