I've noticed the lighter weight oils have helped the Typewriter sound.I have a 16 f250 I tow a 38' 5th with... I put in delo 15w-40 on my first oil change at 5k. Always ran it in my 09 6.4L. The only difference I noticed was the type writer sound more after the oil change when idling in the driveway. I'm going to try Rotella T6 5W-40 with the next change to see if there is a difference. If not, I'll stick with delo 15w-40 as I am the 5k oil interval guy.
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Rotella T6 comes only in 5W40 flavor IIRC.I've noticed the lighter weight oils have helped the Typewriter sound.
I had it with the T6 15W40 went away mostly with 5w40 t6 and completely gone with delo 5w40 and amsoil when i used it. Reason Ive stuck with the 5w40 delo for so long now. You can get Delo Syn 5w40 for 18.96 gallon at Wally world. Sometimes at oreily's for 16.95 gallon with Chevron promotion(rare).
I've heard the compromise of 10w30 is suppose to help too.
Rotella T6 comes only in 5W40 flavor IIRC.
Rotella T4 (aka Rotella T), conventional is available in 15W40 and 10W30.
That's hard to believe that different oil dropped yoour mpg that much, are you sure it isn't due to the winter blend fuel? Or maybe Ford reflashed your computer while you where in there, they are known to do that sometimes, or you may have other issues causing this.So here is an update on my earlier post about Amsoil 5W40 and EA filter.
So being the cheap *** I can be, my local dealership was doing an oil change special for $89 for diesels. So I jumped at the opportunity to save a couple bucks...worst decision ever.
I allowed them to put the Motorcraft Syn-Blend oil and Ford filter in it. Even at 25K miles with Amsoil I was getting 17-19 MPG highway not towing. The Motorcraft Syn-Blend dropped my mileage to 12-13 MPG highway.
All in all...I'm going back to Amsoil after the 5K interval. It may cost me a few bucks more, but I am sticking with Amsoil....IT WORKS!!
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That's hard to believe that different oil dropped yoour mpg that much, are you sure it isn't due to the winter blend fuel? Or maybe Ford reflashed your computer while you where in there, they are known to do that sometimes, or you may have other issues causing this.
There's no way an oil change dropped your mileage that much.So here is an update on my earlier post about Amsoil 5W40 and EA filter.
So being the cheap *** I can be, my local dealership was doing an oil change special for $89 for diesels. So I jumped at the opportunity to save a couple bucks...worst decision ever.
I allowed them to put the Motorcraft Syn-Blend oil and Ford filter in it. Even at 25K miles with Amsoil I was getting 17-19 MPG highway not towing. The Motorcraft Syn-Blend dropped my mileage to 12-13 MPG highway.
All in all...I'm going back to Amsoil after the 5K interval. It may cost me a few bucks more, but I am sticking with Amsoil....IT WORKS!!
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Why 60k when your motor warranty is 100k? If you are going to do it at 60k, might as well do it now.Interesting...I had not considered the flash scenario. I just know the truck ran better; operated at better temps and got better fuel mileage prior to the switch. Even with the winter fuel, I was getting 17 with the Amsoil. I'm in NM do I don't know if the fuel is changed here; but that could make sense. I just can't wait too though 60k mark so I can dump the DEF, DPF, little exhaust and EGR.
2015 Ford F-250 XLT Lariat Crew Cab FX4 6.7 L Powerstroke Diesel