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Old 12-16-2012, 07:02 AM
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Motor oil

i was wondering where i can get 5w-40 non synthetic for winter. I have 164000 miles so its to late to switch. I use 15-40 shell but there 5-40 is synthetic. Is it okay to switch or no. Does anyone know where to get non synthetic 5w-40
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Old 12-16-2012, 07:20 AM
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Don't know what area you live in but Farm and Fleet, Oreillys, Walmart all carry Rotella 5-40w sythentic. Its ok to switch ,go ahead and look foward to easier starts. However, be prepared if you have oil leaks to see a little more!
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Old 12-16-2012, 08:51 AM
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No issues switching at 164,000, unless you are burning/leaking a considerable amount of oil already.
Stay away from Rotella T-6. There have been multiple independent studies showing it holds up poorly to viscosity breakdown and oil shear tests.
Go with something like Valvoline Premium Blue Extreme, or better yet Schaeffer's 7000 or 9000 series oils. Both are offered in 5w40.
Napa carries the Valvoline, and offer's 10% off when you order online and pick up in store. Doesn't make it all that much more expensive that T-6.
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Old 12-16-2012, 09:07 AM
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i have small oil leak but ill adress that in the spring. I got amsoil for now
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Old 12-16-2012, 11:46 AM
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I run valvoline premium blue 5-40 synthetic, switched at 150k when I bought the truck and now have 161k and no issues
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Old 12-16-2012, 04:01 PM
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amsoil has a 5w30 diesel oil that you can run. I would stay with synthetic though; it's a much better oil and Amsoil is one of the best oils out there. I ran the lighter weight oil for a while but the truck did not run as well. I would stick to 15w40.
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Old 12-17-2012, 12:50 PM
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Im running the amsoil 15-40 it starts so much eaiser! My friend sells it at his shop told me synthetic 15-40 flows better than non and it cranks over quicker. It idles so smoothly now motor sounds quiter also. Truck sounds happy now to replace these injectors. Im glad i switched.
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Old 12-17-2012, 08:15 PM
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Quote:
Originally Posted by backwoodsboy View Post
No issues switching at 164,000, unless you are burning/leaking a considerable amount of oil already.
Stay away from Rotella T-6. There have been multiple independent studies showing it holds up poorly to viscosity breakdown and oil shear tests.
Go with something like Valvoline Premium Blue Extreme, or better yet Schaeffer's 7000 or 9000 series oils. Both are offered in 5w40.
Napa carries the Valvoline, and offer's 10% off when you order online and pick up in store. Doesn't make it all that much more expensive that T-6.
Actually, this article Turbo Diesel Register Tech: Lube Oil, Religion, Specifications and the TDR says that the Rotella T6 5W-40 is a good oil.
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Old 12-17-2012, 09:22 PM
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T-6 used to be a quality out. Rotella changed the sheer characteristic of the oil 10 years ago, making it incapable of handing the high-sheer environment of a HEUI system.
Here's a chart of oil breakdown vs hours.
There is also an entire thread on the subject over on PSA
Oil Oil Oil - PowerStrokeArmy
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Old 12-18-2012, 11:43 AM
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Wow...I guess it just depends who's report you read, and WHAT they are testing!

I've read good things about the Valvoline Premium Blue, so each time we go to Bellingham, I pick up a gallon...will try that at the next change.
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