Hey guys I ran shell rotella synthetic t6 5w-40 in my 6.0 was planning on doing so with the 7.3 whats your guys opinions?

 

Mobil Delvac 15w40 here. I think most guys run 15w40 in their IDI.

 

rotella 15w40

 

Delo 400 15w40

 

I run rotella synthetic in everything I have, including lawnmower (mower is 15 yrs old). Before the synthetic came out I ran Rotella T except in a 3406 Cat I ran Shell Rimula.

Used to get the oil at wal mart but have not found any there in the last few months. They do have Rotella T though.

 

I get the walmart 15w40, its cheap and seems to work just fine. Everyone is going to have some sort of brand loyalty, go with whatever you like.

 

I always use rotella 15w 40 with 2 quarts of lucas heavy duty oil stabalizer and the 7.3l powerstroke filter in my idi. Its a little expensive around this part of jersey but we all swear by it around here.

 

Ford and International specified 30 W for these engines when new. Multigrade oils are thin oils with polymers added to thicken at high temps. Oil lubricates, polymers don't. I run Delo 400 30W

Tom

 

Valvoline Premium Blue with 2 Quarts of Lucas Oil Stabilizer, with a Motorcraft 1995 Filter.

 

I prefer old engine oil. It is a little thick and can go down a rough at first, but once you warm up - WOW!!

Caution: it can foul your head - so be careful if you drive when using this oil...

 

Delo 400 30w.

-Enjoy
fh : )_~

 

chevron 15w40 before.... amsoil full synthetic 15w40 now.

 

We have always ran Delo 400 15-40 in everthing that i can remember, great oil. I also throw in a quart of Lucas.

 

Rotella 15W-40 here

 

Rotella 15w40 usually, but this time I tried Motorcraft 15w40 because it was the same price as Rotella but it came in 5 quart jugs, so it was like getting 2 quarts free.