type of oil to use in a 6.0
 

What kind and weight of oil is recomended in a 2003 6.0. what do ya'll use? We run rotella 15-40 in our other diesels would it be alright to run that in the 6.0 too? Thanks Justin

That's what I run in the summer, rotella synth 5/40 in winter... May go to synth year-round.

Slippery... :-missingt

Since you asked... There is a boat load of them (pun intended:-X21).

Conventional Lubricants:
Motorcraft Super Duty 15W-40 or 10W-30
Penzoil Long-Life 10W-30, 15W40
Shell Rotella-T 15W-40
Chevron Delo 400 15W-40, 10W-30
Mobil Delvac 1300 Super 15W-40
Valvoline/Cummins Premium Blue 15W-40
Union 76 Guardol QLT 15W-40
Union 76 T5X Heavy Duty 15W-40
Kendall Super-D 3 15W-40, 10W-30
Quaker State FCI HDX Plus 15W-40
Exxon XD-3 Extra 15W-40
Phillips 66 Super HD II 15W-40
Conoco HD Fleet Supreme 15W-40, 10W-30
Citgo Mystik Premium Fleet 15W-40
Citgo Mystik JT-8 15W-40, 15W-50, 10W-30
Castrol GTX Diesel 15W-40

Synthetics:
Amsoil 15W-40 Synthetic Blend Oil
Chevron Delo 400 Synthetic 0W-30 or 5W-40
Mobil 1 Turbo Diesel Truck Oil 5W-40 Synthetic
Mobil Delvac 1 ESP 5W-40 Synthetic
Motorcraft Super Duty 5W-40 Synthetic
Valvoline Premium Blue Extreme 5W-40 Synthetic
Shell Rotella T 5W-40
Schaeffer's Supreme 7000 Synthetic Blend 15W-40
Schaeffer's Supreme 9000 Synthetic 5W-40
Kendall SHP Diesel (synthetic blend) 15W-40
Petro-Canada Duron XL 15W-40 Synthetic Blend
Royal Purple Synthetic 15W-40
Citgo Mystik SX-8 15W-40 Synthetic Blend
Advantage Duragard Super HD 15W-40
Ford is recommending to use the following oils for the listed operating temperature:
SAE 15W-40 is the preferred oil above 30 degrees, but it is acceptable for use down to 10 degrees, and is recommended for towing down to this temperature.
SAE 10W-30 is the preferred weight between -10 to 30 degrees.
SAE 5W-30 and 5W-40 is acceptable for use below 30 degrees, and 0W-30 is acceptable below zero.
(All temperatures are in Fahrenheit)

Most (not all) of the above info is from BITOG which is an excellent source of oil info:-X22
FWIW Many 6.0 owners run 5W-40 synthetic year round with great results-

I've done UOA (used oil analysis) on my 6.0 for almost 4 years now. I've used Rotella 15w-40, Rotella 5w-40 and Mobil 1 5w-40. The Mobil gave me the best results, less shear being the most noticable quality. Downside to the Mobil- price, $22 per gallon.

No Offense---:-RTFM

I'm going Rotella Syn 5w40 on my next change. Maybe if I want to spend the extra money I'll eventually go Mobile. My dad has the same engine and we've discussed buying Mobile by the 55 gallon drum, but he does a lot of heavy towing so I think he should stick with a 15w-40. Maybe I'll still buy a drum though, 55 gallons is only 15 oil changes :)

ive been running rottela 15w-40 in the late spring threw the late fall.And run rottela 5w-40 syn from the late fall to late spring.I will be looking into staying with a syn oil threw out the year.Starting this year.iam thinking about royal purple or Lucas oil.
But rottela 15w-40 and 5w-40 syn has been good to me for almost 5 years and over 100,000 miles

I want to find an oil and stick to it since I've heard switching back and forth is not good. So I guess I'll stick with synthetic 5w-40 year round. I don't do much towing anyway.

Delo 400, year around. I ran it in my 97 stroker to.
Hay utahtom, where are you in northern Utah? Im in Brigham City?

Does anyone recommend the 15w-40 Mobil Million Mile Oil?

I use Mobil-1 year round

yea, i've been using it since i got my truck.........just seeing what others think

will it hurt it to run rotella 15-40 year round in it

it won't hurt, but if it's really cold where you live, many ppl will recommend 5-40