How often do you change your oil? - Ford Powerstroke Diesel Forum
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post #1 of 31 Old 12-09-2010, 07:36 PM Thread Starter
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How often do you change your oil?

Just curious what oil everyone uses in their 7.3 and after how many miles do you change your oil?

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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post #2 of 31 Old 12-09-2010, 07:45 PM
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i change mine every 3-4k. some oil companies recommend every 3k miles or 3 months but i do mine every 3k. some synthetic oils say you can go 6k or even more than that. my truck starts to run rough when it needs an oil change.

2000 F250 SD ex cab long bed
6spd trans
south bend 350hp-750lb/ft clutch
6 in lift with 37in Km2 BFG
4in mbrp turbo back single exhaust
TS 6 Pos Chip
DIY intake
SOON TO COME
new injectors
some sort of turbo upgrade
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post #3 of 31 Old 12-09-2010, 07:48 PM Thread Starter
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Originally Posted by Sullie250 View Post
i change mine every 3-4k. some oil companies recommend every 3k miles or 3 months but i do mine every 3k. some synthetic oils say you can go 6k or even more than that. my truck starts to run rough when it needs an oil change.
They make Synthetic oils for diesels? I didn't see any today when i was in the auto parts store.
My truck was a quart low, so i got some Delo400 15-40

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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post #4 of 31 Old 12-09-2010, 07:49 PM
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I use Shell Rotella T 15w40, change it every 3k. I know I could probabaly go longer, but with 203k miles and my heavy-footed driving style, it's best to keep fresh oil in it IMO

1996 F250 7.3 PSD 4x4 - "Dally"
274k miles
It's got some go fast stuff
Sitting on 2006 F-350 axles and suspension

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post #5 of 31 Old 12-09-2010, 07:55 PM
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i use delo400 15w/40 and nothing else. thats just what i use. and yes they make synthetic diesel oils. i used to work for a chevy dealer (realized how much the duramax sucked so i bought a powerstroke) and we did sell a mobil 1 synthetic 5w/40. and mobil 1 told us that you could go up to 12k on this oil. not me. i got every 3k. and what some people dont know is that the molecules in the oil will break down over time and not lubricate as well as it is supposed to. thats why the oil companies recommend 3k or 3 months.

2000 F250 SD ex cab long bed
6spd trans
south bend 350hp-750lb/ft clutch
6 in lift with 37in Km2 BFG
4in mbrp turbo back single exhaust
TS 6 Pos Chip
DIY intake
SOON TO COME
new injectors
some sort of turbo upgrade
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post #6 of 31 Old 12-09-2010, 07:59 PM Thread Starter
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I use Mobil 1 is all my race cars/4wheelers. That's good to know they make a diesel oil maybe i'll use that. So sounds like everyone changes their oil every 3k. Anyone with synethetic go longer?

2003 F350 Crew Cab 7.3L
- AFE Stage III Intake
- 4" Exhaust
- Goose neck setup
- Billet Grill
- 3 gauge A-Arm Cluster (Trans Temp, Boost, Pyro)
- DP F8 Chip
- Banks Big Head
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post #7 of 31 Old 12-09-2010, 08:27 PM
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theres alotta guys going 5k+ or more on synthetic(more than 5K they have a bypass system though.. gotta change that filter!!) anyway i do 3k-4k max with dyno oil(running CI4 grade oil right now, ha ha yes very hard to get but the truck likes it way better than the new CJ4 standard, she purrs like a kitten starting in the 30's. not near as loud as with the delo i was running.
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post #8 of 31 Old 12-09-2010, 08:27 PM
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I'm an Amsoil guy myself. I run 15W 40 in the summer, and 5W 40 in the winter. I usually change it about every 7,500 miles or so.
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post #9 of 31 Old 12-09-2010, 08:45 PM
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Blackstone Labs tells me 5200, I go 5200. 3-4 oil changes a year is enough to make me feel secure. Of course the fact that the big hoss is sittin at 381k miles makes me comfortable too
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post #10 of 31 Old 12-09-2010, 08:50 PM
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delo 15-40 i change the oil every 3k also
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