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6.4L Power Stroke Engine and Drivetrain Discussion of the 6.4L Power Stroke diesel engine and drivetrain in the 2008-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.4L Power Stroke engine.

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Old 05-31-2009, 04:14 AM   #1 (permalink)
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What's the best oil to use in 6.4?

I have '08 F250 6.4 liter and it's time for the 2nd oil change (10k miles). 1st one was at the dealer. I am a huge fan of Mobil 1, but I'm not sure what oil meets the CJ4 spec requirements and won't plug up my DPF.
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Old 05-31-2009, 07:43 AM   #2 (permalink)
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I am using Mobil 1 Turbo Diesel ... it meets the CJ-4 spec ... I have used Mobil 1 in my last 2 trucks so, I say stick with what you know works

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Old 05-31-2009, 09:57 AM   #3 (permalink)
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Originally Posted by Lancelot View Post
I have '08 F250 6.4 liter and it's time for the 2nd oil change (10k miles). 1st one was at the dealer. I am a huge fan of Mobil 1, but I'm not sure what oil meets the CJ4 spec requirements and won't plug up my DPF.
DELO LE 15W40 is CJ certified and will meet all your 6.4's oil requirements out to 10k. Its about half the cost of any synthetic. Your money, your call.

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Old 05-31-2009, 10:16 AM   #4 (permalink)
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Motorcraft 15W40 is CJ-4 certified and comes in 5 quart jugs at Walmart for $11. Shell Rotella T 15W40 is also CJ-4 certified and comes in 4 quart jugs at Walmart for $10.50. I noticed most of the other compliant oils are similarly priced.

Motorcraft is the best value for your money. I'd run it just because it's simple: three 5 quart jugs. Whereas you'll have some leftover with the gallon jugs.
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Old 05-31-2009, 10:51 AM   #5 (permalink)
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I'm using Motorcraft 15w40 in my '08 F250 6.4, purchased in 5 qt. jugs @ Wal-Mart for $11.50 each. ( Motorcraft oil filter FL-2016 / $18.44 @ Wal-Mart) Obviously meets all Ford warranty requirements, and changed at 5,000 mile intervals.
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Old 05-31-2009, 08:35 PM   #6 (permalink)
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Price varies from Walmart to Walmart apparently. The Walmart in Brea, California (Orange County) charges $11.50 (last I remember) yet the Walmart in Rosemead, California (Los Angeles County) charges $10.50. It pays to do your shopping, folks.
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Old 06-01-2009, 04:02 AM   #7 (permalink)
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I am using Mobil 1 Turbo Diesel ... it meets the CJ-4 spec ... I have used Mobil 1 in my last 2 trucks so, I say stick with what you know works
I didn't know that Mobil 1 made a turbo diesel oil. Where do you buy it?
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Old 06-01-2009, 04:13 AM   #8 (permalink)
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Originally Posted by timid1 View Post
Motorcraft 15W40 is CJ-4 certified and comes in 5 quart jugs at Walmart for $11. Shell Rotella T 15W40 is also CJ-4 certified and comes in 4 quart jugs at Walmart for $10.50. I noticed most of the other compliant oils are similarly priced.

Motorcraft is the best value for your money. I'd run it just because it's simple: three 5 quart jugs. Whereas you'll have some leftover with the gallon jugs.
How often do you change your oil? I think Ford says you should change it every 7500miles whether you use sythetic or not.
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Old 06-01-2009, 07:46 AM   #9 (permalink)
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I buy the gal jugs at Wal-Mart, I change it every 5000. For me changing my oil every 5000 miles is cheap insurance for a long lasting engine.
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Old 06-01-2009, 10:24 AM   #10 (permalink)
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I am using Mobil 1 Delvac 5w40 same as I used in my 6.0. It enables me to run the same oil year around. I had very good oil analysis results on the Mobil oil.
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Old 06-01-2009, 09:27 PM   #11 (permalink)
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I am using Mobil 1 Delvac 5w40 same as I used in my 6.0. It enables me to run the same oil year around. I had very good oil analysis results on the Mobil oil.

The Delvac 5w40 is suppose to be the same oil sold as Mobil 1 5W40 turbo diesel you get in quarts.
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Old 06-02-2009, 08:10 AM   #12 (permalink)
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Originally Posted by timid1 View Post
Motorcraft 15W40 is CJ-4 certified and comes in 5 quart jugs at Walmart for $11. Shell Rotella T 15W40 is also CJ-4 certified and comes in 4 quart jugs at Walmart for $10.50. I noticed most of the other compliant oils are similarly priced.

Motorcraft is the best value for your money. I'd run it just because it's simple: three 5 quart jugs. Whereas you'll have some leftover with the gallon jugs.
Isn't an oil and filter change 15-1/2 quarts ?????
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Old 06-02-2009, 10:24 AM   #13 (permalink)
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Old 06-02-2009, 07:17 PM   #14 (permalink)
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Isn't an oil and filter change 15-1/2 quarts ?????
Exactly 15 quarts. On the dot. Just like the diesel supplemental handbook says.
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Old 06-03-2009, 04:18 AM   #15 (permalink)
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Mine usually comes out to 14.
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Red 2005 F-350 XLT SRW 4x4 6.0L reg. cab 6-speed rubber floors BFG 12.5x35 mud-terrains, no lift traded for:
Red 2008 F-350 XLT SRW 4x4 6.4 reg. cab 6-speed. Got carpet this time- audiophile stereo deletes rubber floors. BFG 12.5x35 mud terrains, no lift.
Traded at 45K for: Red 2011 F-350 XLT SRW 4x4 6.7L reg cab BFG 12.5x35 mud terrains, no lift. "optioned" out of- stick shift, rubber floors, audiophile stereo, fog lights, chrome step bars GRRRRR!
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