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Old 05-11-2018, 10:55 PM   #1
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Question: F150 5.0L Engine Oil

I searched the Forest River threads and F-150 forums and I'm still trying to settle on answer.

I recently purchased a used 2015 Ford F150 5.0L very well equiped to tow. Ford recommends using 5w-20 for the 5.0L engine. Old school me thinks that 05w-20 is a little like lubricating the engine with water so I started searching the web both here and on F-150 forums. So far, here's what I've found:

1) OLD school says that Ford recommends 5w-20 to help meet CAFE fuel milage requirements using lighter weight oil. Step up to 5W-30 for better lubrication.

2) NEW school says the 5.0L tolerances are much tighter and that 5w-20 is needed to lubricate tighter engine tolerances.

No where in any of my extensive web searches have I found anyone who qualifies as a Ford power plant engineer with an answer. I have also searched other forums where the 5.0L is used (Mustang) with no definitive answers.

Here's my question.... Ford recommends using 5W-20 engine oil in the 5.0L. But when I'm pulling my camper during high temps up very long - sustained - high mountain passes, wouldn't my 5.0L be better served with 5w-30 instead of 5w-20?

Anyone with similar questions/experiences are welcome....

Rich J.
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Old 05-11-2018, 11:04 PM   #2
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Quote:
Originally Posted by HangDiver View Post
I searched the Forest River threads and F-150 forums and I'm still trying to settle on answer.

I recently purchased a used 2015 Ford F150 5.0L very well equiped to tow. Ford recommends using 5w-20 for the 5.0L engine. Old school me thinks that 05w-20 is a little like lubricating the engine with water so I started searching the web both here and on F-150 forums. So far, here's what I've found:

1) OLD school says that Ford recommends 5w-20 to help meet CAFE fuel milage requirements using lighter weight oil. Step up to 5W-30 for better lubrication.

2) NEW school says the 5.0L tolerances are much tighter and that 5w-20 is needed to lubricate tighter engine tolerances.

No where in any of my extensive web searches have I found anyone who qualifies as a Ford power plant engineer with an answer. I have also searched other forums where the 5.0L is used (Mustang) with no definitive answers.

Here's my question.... Ford recommends using 5W-20 engine oil in the 5.0L. But when I'm pulling my camper during high temps up very long - sustained - high mountain passes, wouldn't my 5.0L be better served with 5w-30 instead of 5w-20?

Anyone with similar questions/experiences are welcome....

Rich J.
If you have a warranty issue in the future you'd better be able to produce proof of 5-20
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Old 05-11-2018, 11:13 PM   #3
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I'm out of warranty - not worried about that. Now my thinking is longevity.
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Old 05-12-2018, 10:58 AM   #4
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Ford recommends 5-20. These are not old school engines anymore.
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Old 05-12-2018, 11:34 AM   #5
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if your going for longevity id do what the factory recommends and not add your own spin on things. Stick to the same thing each and every time and stay on regular change intervals. And none of it matters if the previous owner never changed it and ran it into the ground prior to your purchase.
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Old 05-12-2018, 12:00 PM   #6
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Use what Ford recommends. The oil life monitor calculates when you tow and will tell you when to change it. Read Fords recommendation again, it should say "synthetic blend" which also helps lubricate. My first change on my 2016 I used full synthetic.


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Old 05-12-2018, 12:54 PM   #7
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Stick with the Ford-recommended oil. These recommendations extend to all motor vehicles today. Engines are very tight tolerance and require a very thorough lubrication and clean lubes, which requires lower viscosity oils. These keep the engine cooler and running better even in high summer temperatures and while towing trailers. Changing the oil frequently prolongs engine life. While counterintuitive, lower viscosity oils are and always have been better for engine life. My college advisor drove a big Buick with a big motor and his mechanic told him to use 0W oil if he could find it. Even 5W was ok. I thought he was crazy. At 520,000 miles, the engine finally required a valve job. When the mechanic pulled the heads, they looked brand new. All of his vehicles received 0W oil. Turns out he wasn't crazy after all.
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Old 05-12-2018, 01:22 PM   #8
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Oil For 5.0 L F 150

I have a 2011 5.0L F 150. It has only been serviced by my Ford dealer. I don't care what they put in it! Its under extended warranty and if it blows, then Ford pays the bill. If its serviced by someone else, then who knows what Ford will do?
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Old 05-12-2018, 01:29 PM   #9
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Thanks everyone for the responses. Obviously I'm over thinking this, which is dangerous in that the truck is smarter than I am. I'll stay with the recommended 5W20 oil.

Still much to learn,
Rich J
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Old 05-12-2018, 01:34 PM   #10
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Extra virgin olive oil
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