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Old 10-21-2010, 05:20 PM
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Question wanting to switch oil

Im wanting to switch from dino oil to synthetic oil. What is the best oil to use? Pros and cons of every type you guys have tried. How much of a difference in price is there? Is there anything that needs to be done when changing over? Any additives? Sorry for a bunch of questions i just want to make sure i have all the bases covered.
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Old 10-21-2010, 08:02 PM
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For the price Rotella T-5 (synthetic blend, unless you are using 0w-30 or 0w-40), is a nice compromise. There are some that also like Rotella t-6 for a full synthetic, it only comes in 5w-40. Not many say they use Mobil 1 TDT (turbo diesel truck) but it is a good oil but a few dollars more a gallon.
Amsoil is the best out there but is the most expensive.
The most important is thing is to make sure that your oil is properly rated.
Use a Ford or Racor oil filter ONLY, they are the patent holders!
Just put the synthetic in without adding any additives, there are no ill effects from switching between syn to dino and back.
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Old 10-21-2010, 08:16 PM
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Rotella is the cheapest syn. I prefer not to use rotella 5W-40 because of the UOA's that I have seen on it compared to mobil. I really like Mobil 1 5W40.

Both can be purchased from wallmart. Right now Mobil 1 is $25 a gallon. last week it was $21 a gallon.

My 2 top oil choices are mobil and amsoil. I do not use amsoil that often because it is more $$ than Mobil 1.

I go about 6,5000 miles on mobil. Once I get my bypass filter, I will go longer with testing the oil.
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Old 10-21-2010, 08:26 PM
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I know this is a 6.0 thread, but I run Valvoline Premium Blue Extreme 5w40 synthetic and its been great so far. I saw some comparison tests that an independent facility did before I decided on the valvoline (I've never used valvoline before) and was impressed with the scores. Its not the cheapest out there, but beat most all cheaper options and some of the more expensive options.

It makes for easier cold starts, more power after a cold start, and faster warm ups. All my oil analysis have come back with flying colors. I run the motorcraft oil filter.

Good luck. Nows a good time to change, before winter.
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Old 10-22-2010, 04:41 AM
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I just switched to Series 3000 Synthetic 5W-30 Heavy-Duty Diesel Oil and I like it. As others have said Amsoil is big bucks but I've been using it for a few years now and like it so that is what I am using in the 6.0L.
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Old 10-22-2010, 07:12 AM
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I agree on the Amsoil being the best out there. Second on the list is Schaeffer 9000, followed by the Valvoline extreme blue. 5w40 is pretty well a standard for these trucks. The injectors like the cold starts better with a 5w. With the problem the 6.0 has with shearing on 40 weights lots of people are switching to 30 weights. Much Much less shearing if any and the injectors love it.
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Old 10-22-2010, 07:16 AM
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Schaeffers 9000 or premium blue extreme is all my truck will run

I tried the Rotella T5. Wont run the junk again
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Old 10-22-2010, 07:28 AM
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Quote:
Originally Posted by Dave View Post
Schaeffers 9000 or premium blue extreme is all my truck will run

I tried the Rotella T5. Wont run the junk again
And what classifies the T5 as junk?
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Old 10-22-2010, 09:19 AM
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thanks guys for all the info. My truck sits alot and im just wanting to put the best stuff in. So when i use it i will be good to go.
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Old 10-22-2010, 09:23 AM
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Quote:
Originally Posted by obsidian View Post
And what classifies the T5 as junk?
Injector noise. crap cold starts stuff like that. The fact that the **** flat out stinks. They dont call it rosmella for nothing

I prefer to run good oil
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