Oil question

[F250HIGHBOY77]

I have been around deisels all my life but the 7.3 in my 97 OBS is all new to me. I have heard that they are kinda picky on oil. On the farm I work for they use John Deere oil in everything BUT his dad's 96 powerstroke. I was wondering on using Rottella or Mobil Delvac. She has 334k mi on the odo but no leaks and no smoke or oil usage...yet. I also noticed that both have diff grades and "better" this and that. I just want her to live happy without synthetic since the high miles.

[jjones96]

I run delvac. Its works just fine

[Qwazert]

Apparently Rotella is crap, although I've used it for the past two changes with no real issues.

I'm now using Valvoline Premium Blue...too early to tell if it's as good as they say it is.
MotorCraft makes a 15W-40 specifically for the PSD.

[jesilvas]

No reason to shy from synthetic because of mileage.
There's too many threads about this to count. Read.
15w40 is. 5w40 will make it happy.

And motorcraft makes anything for something they sell.

I made my Samsung SGH-I997 send this.

[F250HIGHBOY77]

Thank you very much. I didn't even think about Motorcraft oil!

[backwoodsboy]

My recommendations would be:
Schaeffer's 9000 series 5w40
Schaeffer's 7000 series 15w40
Valvoline Premium Extreme Blue 5w40
Mobil 1 Full Synthetic 5w40
Schaeffer's is hard to find, and can be pricey but is hands down the best oil money can buy IMHO.
Rotella used to be a great oil, but has been changed recently and doesn't hold up to sheer very well.

[vandy]

Originally Posted by Qwazert

Apparently Rotella is crap,

Esplain plz? Ive heard its good? I'm running it now. Tossed around going to Amsoil. But having issues justifying the cost.

[roadrunner]

Originally Posted by F250HIGHBOY77

I have been around deisels all my life but the 7.3 in my 97 OBS is all new to me. I have heard that they are kinda picky on oil. On the farm I work for they use John Deere oil in everything BUT his dad's 96 powerstroke. I was wondering on using Rottella or Mobil Delvac. She has 334k mi on the odo but no leaks and no smoke or oil usage...yet. I also noticed that both have diff grades and "better" this and that. I just want her to live happy without synthetic since the high miles.

I've been using John Deere Plus 50/Plus 50 II since they introduced it in the mid 90's in a wide array of diesel engines, including Powerstrokes.

You'll be hard pressed to find a better oil to hold up in our HPOP, as my UOA's have shown.

Currently my Ford stable includes an '89 IDI & an '07 6.0, both get Plus 50 II 10w-30.

[crazy_canadian]

I am running Rotella 15w40 in the summer.
And Rotella T6 (syntec) 5w40 in the winter. Starts way easier.
Always using a Mortorcraft filter. It takes about 2k miles before the oil starts to turn black.

[ctd12valve95]

Carquest is now making 5w40 synthetic, it's pretty cheap, I run valvoline 5w4o myself