10w30 all year?
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#6
Originally Posted by Fluid Power
Talked to my ford dealer today to get a price on oil. He says that their service guys only use 10w30 for the 6.0 PSD's. Even in the summer? it can get 100+ degrees f here in the summer.
Does this sound right to you?
Does this sound right to you?
The newest recomendations are to run 15W-40 from 10F & Up and if towing to run 15W-40 from -20F & Up.
FMC says that 10W-30 can be used above 30F but it is not the oil of choice at higher tempratures or towing.
They go on to say that 5W-30 or 5W-40 can be used from 30F and below. Now i have never seen 5W-30 in diesel oil in the US so i do not know of its availability. The only 5W-40 diesel rated oil i have ever seen is all synthetic. Since 5W-40 is synthetic and the flash point is similar to 15W-40 dino i would see no problem running 5W-40 at all temperatures.
Personally i run 15W-40 dino year round, coast to coast and i tow alot. Living in the desert southwest 10W-30 is not in my vocabulary. The 6.0 is extremely hard on engine oil and quickly shears a 15W-40 down to a 30 weight oil, i don't like to think about where the 10W-30 is going to shear down to.
If you live in a cold climate and don't tow alot then run 10W-30 in the winter for easier starts (or just plug in sooner if you run 15W-40) and 15W-40 in the summer. Or you can run 5W-40 year round if you live were it gets really cold in the winter.
Here is the latest TSB on the subject
http://www.ford-trucks.com/tsb/fullt...hp?tsb=05-16-6
Hope this helps
#7
Originally Posted by Fluid Power
Talked to my ford dealer today to get a price on oil. He says that their service guys only use 10w30 for the 6.0 PSD's. Even in the summer? it can get 100+ degrees f here in the summer.
Does this sound right to you?
Does this sound right to you?