View Poll Results: Specifically for the 2004-2008 5.4L V8 Triton, what oil do YOU use?
0W-40
9
1.06%
5W-20
474
55.76%
5W-30
289
34.00%
5W-40
18
2.12%
10W-30
33
3.88%
10W-40
13
1.53%
Any of them, it doesn't matter
5
0.59%
Other
9
1.06%
Voters: 850. You may not vote on this poll
5.4L Engine Oil - "What Should I Use?"
#23
Isnt the whole reason the cam phasor starts to tick due to lack of oil getting to it? I was told the oil ports are small and by time oil gets to the last phasor it does not have to pressure and some what is starving it of oil. I usually only run motorcraft oil but after hearing this I started running royal purple, just because I figured it would be (slicker)
If im wrong please let me know, but thats what I have been told.
If im wrong please let me know, but thats what I have been told.
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Mr-fx4 (12-05-2019)
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cwalter (01-12-2018)
#25
Some guy
Thread Starter
Plus I wouldn't trust any oil that's purple... that's not the "natural" color of it, so there has to be some kind of dye in there (unnecessary, useless additive).
I'm using Castrol GTX high mileage syn blend. Works for me.
The following 3 users liked this post by Martian:
#26
What is more important is how often you change your oil, what filter you use and if you are using a oil with high detergent content. If you are changing your oil every 3000-3500 miles you are going to have a long happy engine. If you buy into the bull of extended oil change intervals and using cheap oils then well you will end up with this.
Only 92K used Motorcraft 5w-20 syn blend its whole life. It had 5K-6000 mile oil change intervals. Varnish from oil being in there too long killed this motor. It is on a stand waiting for a stroker kit, with forged rods, pistons and crank. This will be under a nice positive displacement supercharger.
Only 92K used Motorcraft 5w-20 syn blend its whole life. It had 5K-6000 mile oil change intervals. Varnish from oil being in there too long killed this motor. It is on a stand waiting for a stroker kit, with forged rods, pistons and crank. This will be under a nice positive displacement supercharger.
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o6S1D9e (11-23-2021)
#27
Moderator (Ret.)
^^ Agreed ^^
I find it wasteful though for those who will buy a full synthetic, and change it at 3000 to 4000 intervals; that is wasting money; switch to a synthetic blend for that interval. If I use full synthetic, I leave it in for at least 5000 miles. I have 140K on my 4.6, pull a 6000 camper often, and the engine is running fine.
I switch between semi and full synthetics, depending on which is on sale at the time of my oil change. If I get semi synthetic, its changed at 3500 miles tops, and with full synthetic, no more than 5500 miles, a little less if I pulled the camper more during that oil install. I also run with an engine oil cooler.
I find it wasteful though for those who will buy a full synthetic, and change it at 3000 to 4000 intervals; that is wasting money; switch to a synthetic blend for that interval. If I use full synthetic, I leave it in for at least 5000 miles. I have 140K on my 4.6, pull a 6000 camper often, and the engine is running fine.
I switch between semi and full synthetics, depending on which is on sale at the time of my oil change. If I get semi synthetic, its changed at 3500 miles tops, and with full synthetic, no more than 5500 miles, a little less if I pulled the camper more during that oil install. I also run with an engine oil cooler.
Last edited by Mod (Ret.); 04-01-2016 at 05:05 AM.
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Tom Stahl (10-07-2022)
#28
Senior Member
What is more important is how often you change your oil, what filter you use and if you are using a oil with high detergent content. If you are changing your oil every 3000-3500 miles you are going to have a long happy engine. If you buy into the bull of extended oil change intervals and using cheap oils then well you will end up with this.
Only 92K used Motorcraft 5w-20 syn blend its whole life. It had 5K-6000 mile oil change intervals. Varnish from oil being in there too long killed this motor. It is on a stand waiting for a stroker kit, with forged rods, pistons and crank. This will be under a nice positive displacement supercharger.
Only 92K used Motorcraft 5w-20 syn blend its whole life. It had 5K-6000 mile oil change intervals. Varnish from oil being in there too long killed this motor. It is on a stand waiting for a stroker kit, with forged rods, pistons and crank. This will be under a nice positive displacement supercharger.
The following 2 users liked this post by Mulestang:
4theFordofit (01-25-2022),
hdracer2 (02-20-2023)
#29
It came out of a 05 mustang, manual trans. Extensive dealer(s) records but the thing that stuck out the most was the intervals between a service. Almost all were 5k and above with most between 6-7k. I feel like the oil is fine for 3-4000 miles but beyond that you have depleted the additive package beyond what I feel comfortable with. Now combine that with the known issue of weak oil pumps and low oil pressure and you have oil that doesn't circulate as it should, in there a bit to long and you have what you see here.
#30
Here at work we use Shell Rotella T 15w40 or Mobil Delvac 1300 15w40 in everything we work on, Police cars (Crown Victoria's with 4.6) , light duty trucks (5.4L & 6.8L) & Heavy Trucks, We have never in my 15 years here had an engine failure due to engine oil! Other then when the oil pan was ripped off the engine while in pursuit. 250 Hrs. or 4,000 miles, whichever comes 1st.
5w20 was introduced so the "warm up" time could be cut down to increase miles per tankful.
5w20 was introduced so the "warm up" time could be cut down to increase miles per tankful.
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o6S1D9e (11-23-2021)