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Hey i just recently bought a 6.4 just wondering about all the filters should i use motocraft if not what brand. Also i was told they are very sensitive to there fuel so what additives are safe to use for the injectors.
 

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Use motorcraft filters only.

I use dieselfiltersonline

I get my motorcraft filters seriously almost half off from them... I've been using them since 2012
 

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Ok ill check out that website thanks for the help guys you know what additives are safe to use with it


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I ran Stanadyne Performance in the fuel on my 6.4. There are some other good ones too like Opti-Lube XPD, just look for one that demulsifies water and increases cetane. Lot's of guys use Archoil both fuel & oil additives. Use Motocraft filters, change oil at 5k, fuel fiters at 10k, drain the water seperator, get the gold coolant out and switch to Cat-1 ELC. Basically don't slack on maintenance, and keep the water out of your fuel. Don't get carried away with tunes and watch your temps
 

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I ran Stanadyne Performance in the fuel on my 6.4. There are some other good ones too like Opti-Lube XPD, just look for one that demulsifies water and increases cetane. Lot's of guys use Archoil both fuel & oil additives. Use Motocraft filters, change oil at 5k, fuel fiters at 10k, drain the water seperator, get the gold coolant out and switch to Cat-1 ELC. Basically don't slack on maintenance, and keep the water out of your fuel. Don't get carried away with tunes and watch your temps


Okay awesome thank you and do i have to change it every 5000 if it full synthetic as well and just curious why is that cat coolant better?


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Okay awesome thank you and do i have to change it every 5000 if it full synthetic as well and just curious why is that cat coolant better?


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If you do used oil samples you could probably run your oil longer, I just never did cause I was told never to skimp on maintenance with a 6.4 :) So I'm just passing that advice along. And Ford gold has silicates in it that can turn to goop and clog oil coolers, you don't have that problem with ELC
 

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Read one of the threads on here about flushing/changing your coolant. Check your temp deltas first, oil temp should be within 15*F of coolant temp. If it's good I would not do a chemical flush because you might clog a good oil cooler. If temps are good I would just use distilled water and drain N fill about 4-6 times till all the gold is out. On the last fill use 3 1/2 to 4 gallons of non diluted ELC then top it off with distilled. You have to pull the block plugs and the one on the passenger side is behind the starter, some guys put a fumoto valve in to keep from pulling the starter every drain. the 6.0 takes a F108N, I think the 6.4 is the same. It's an all day job.
Now if your deltas are high and your oil cooler is bad then you can do the restore/restore+ flush then rinse repeatedly with distilled BEFORE replacing the oil cooler. Best place to buy OEM parts is one of the site sponsors like Autonation Ford WBL or Sunrise, they'll beat your local dealer everytime
 
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I've never used any fuel additives in my 6.4 but always drain the water separator and buy from high volume places (still can have messed up fuel, you never know, but consensus is less likely).

I run Rotella T6 5w-40 and always go past 5,000 miles.

Do an oil analysis to verify for your truck though b/c you'll never know by just following word of mouth and forum opinions.

I agree if your spread of temps is good, don't mess with any chemical flush. Just flush and switch. I've never used distilled water with any vehicle I've ever owned, never had an issue, city water works fine for me. You can make your own decision on that.
 
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