I've got an 05 6.0 f250 i use Rotella 15-40 now does anyone get better fuel milage with different oil or have less problems with sticking injectors any thoughts I've loosed some fuel milage lately running kinda ruff changed oil and filters helped a lil put in some hot shot been helping any suggestions thanks

 

Let the fun begin....

 

I run the same Rotella 15w 40

 

Do you put any additives in you oil to help with the injectors and keep them from sticking?

 

Try running 5w-40 synthetic and see if it make a difference. Is it due to cold weather ? My truck was put on 5w-40 one year when it got cold and truck would romp till warm. Not any more.

 

I use Rotella T6 5w40. No additives normally. Good quality at a reasonable price for a synthetic. I often catch it on sale at different places.

 

Archoil ar9100 for additive.

I run 10w30 but I think I'm in the minority. Just make sure it's the correct ratting (for diesels).

.

 

Rotella T6 5w40
Might try Mobil 5w40 next

2006 F350 4X4

 

Mobile 15-40 summer months. Rotella 5-40 winter months

 

As you may have noticed it is kind of personal prefference. As long as it suits your budget and the operating conditions and environment it lives in you will get as many different answers as you do replys.

 

Anyone get better fuel milage with the synthetic oil 5w40

 

This time of year it's kinda hard to tell from what I've seen due to winter fuel (depends on where you live for that I suppose)

2006 F350 4X4

 

Not particularly. Where I buy fuel from seems to make more difference than the switch to 5w40 did.

 

Rotella CJ4 0W40

Josh

 

DMO (Canadian made, bought at my Co-op) a 0w40, diesel CJ4 rated, synthetic. Been using it for 4 years. Change at 5000 miles. When I was using 15w40 Dino it was at 3000 miles. I would use 10w30 in the winter, I would often have to change early if temps dropped so I ended up changing to the synthetic. Also, for a long time before, used DELO chevron 5w40 synthetic. I don't see huge mileage improvements but I do have easy starting, even at very cold temps with no block heater plunged in and never had to add additives for stiction. Use use Ford Cetane booster and antigel somewhat regularly, or Diesel Kleen when I need to.