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Ford 3.5 Ecoboost longevity

Old 01-13-2020, 06:43 PM
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Default Ford 3.5 Ecoboost longevity

I am looking at buying a 2015 F150 with a 3.5 Ecoboost, it has 92k miles. What does the THT brain trust say about these motors once they get some miles on them?
Old 01-13-2020, 06:47 PM
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I just traded my 2013 F150 EcoBoost in, it had 223,000 miles on it. Great engine. Never any problems with the motor.
Old 01-13-2020, 06:49 PM
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Treat it like any non-diesel truck with almost 100,000 miles on it.
Old 01-13-2020, 08:17 PM
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Have a 2013 3.5 with 145,000 on it. Love the truck oil changed every 5,000. Hope to get 250k+ on it
Old 01-13-2020, 08:28 PM
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Have 193,xxx miles on ours. Got the timing chain rattle on start up at around 120,000. Haven’t bothered to get that fixed. Besides that slight noise on cold start we haven’t had any issues with the motor. It’s been extremely trouble free.
Old 01-13-2020, 09:10 PM
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2012 176K miles no problems here.
Old 01-13-2020, 09:33 PM
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123k on 2012
Old 01-13-2020, 09:57 PM
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Originally Posted by rcmay View Post
I am looking at buying a 2015 F150 with a 3.5 Ecoboost, it has 92k miles. What does the THT brain trust say about these motors once they get some miles on them?
I owned one and it was fantastic. However I don't care if it is a normally-aspirated, diesel I don't know or Turbo. I'm done at a hundred thousand miles. At that point is pay me now or pay me later repairs or payments I'll take the payments and I do not deal with repairs and my vehicle being in the shop. Been there done that.

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Old 01-14-2020, 04:52 AM
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Longevity of the 3.5 motor is directly correlated to the quality of upkeep. It's a motor that needs to have 5,000 mile oil changes without question--not what the dashboard tells you. I would only buy one used that has maintenance records.
Old 01-14-2020, 06:29 AM
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Originally Posted by Bamaman View Post
Longevity of the 3.5 motor is directly correlated to the quality of upkeep. It's a motor that needs to have 5,000 mile oil changes without question--not what the dashboard tells you. I would only buy one used that has maintenance records.
This is exactly what I've been hearing and reading, in addition to running only fully synthetic motor oil and no conventional.
Old 01-14-2020, 06:42 AM
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2011 gen1 eco boost here with 113,000 on the ticker. Not one issue. Full synthetic oil changes every 4-5,000
Old 01-14-2020, 07:24 AM
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Like mentioned above. Maintenance, especially oil changes are key. I'm on my 2nd one now. They are great trucks but I would not buy one without maintenance records.
Old 01-14-2020, 02:18 PM
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I just bought my first F150 with an eco-boost and am very satisfied with the engine. I know that doesn't answer your question but I will.

We first started buying Transits in late 2016, 2017 model year. The first 6 we bought had the ecoboost (we later switched to buying the regular engine). Two of them now have 178K and 175K miles. Other than routine maintenance none of the ecoboosts have had any problems. Both will be replaced this year but not because of previous issues, we do not keep vans for over 5 years or over 200K miles.
Old 01-14-2020, 07:13 PM
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Originally Posted by txaggie25 View Post
Have 193,xxx miles on ours. Got the timing chain rattle on start up at around 120,000. Haven’t bothered to get that fixed. Besides that slight noise on cold start we haven’t had any issues with the motor. It’s been extremely trouble free.
Have you tried changing the tensioner? On my car GM released an updated tensioner a few years after I bought the car. I remember it quieting it down a lot and that was well over 100,000 miles ago.
Old 01-17-2020, 05:38 PM
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Originally Posted by iFishMD View Post
I had a friend who tows an RV frequently who says he will go with a 3/4 ton truck after owning two ecoboosts. He said the motors feel "tired" when they get to 150k. I am not sure what that means. Do any owners who tow feel the same way?
I have EcoBoost F-150 gas powered F-250 diesel-powered F350. They are all awesome and reliable. You can't expect F-150 to tow like a Superduty. The F-150 EcoBoost is fun off road and can be an excellent daily driver but I wouldn't tow much with it having driven all of the above. That's true for any half ton truck that's why I drive an F-350 i
as a daily driver. Better than have too much than not enough truck.
Old 01-17-2020, 07:44 PM
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I just had to replace a leaking water pump at 123k. I did the job myself for about $100 in parts
Old 01-18-2020, 11:18 AM
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Originally Posted by Bamaman View Post
Longevity of the 3.5 motor is directly correlated to the quality of upkeep. It's a motor that needs to have 5,000 mile oil changes without question--not what the dashboard tells you. I would only buy one used that has maintenance records.
why would the Ecoboost require 5k synthetic oil changes? Is that what Ford reccommends? Synthetic oil should have no deterioration at 7-10k miles.
Old 01-18-2020, 11:29 AM
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Originally Posted by 71Outrage View Post
why would the Ecoboost require 5k synthetic oil changes? Is that what Ford reccommends? Synthetic oil should have no deterioration at 7-10k miles.
Turbo's are driven by the hot as Hades exhaust gases. The turbo is oil lubricated, and the small amount of oil that flows from the engine to the turbo is exposed to much higher temperatures than the engine. It basically cooks the oil and it needs to be changed more frequently. The turbo is responsible for the more frequent oil changes, not the engine. The engine will suffer premature wear (timing chain stretch) if the oil is compromised from the turbo.
Old 01-18-2020, 11:54 AM
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Originally Posted by xlr8ngn View Post
Turbo's are driven by the hot as Hades exhaust gases. The turbo is oil lubricated, and the small amount of oil that flows from the engine to the turbo is exposed to much higher temperatures than the engine. It basically cooks the oil and it needs to be changed more frequently. The turbo is responsible for the more frequent oil changes, not the engine. The engine will suffer premature wear (timing chain stretch) if the oil is compromised from the turbo.
this is correct, but the turbos on my truck are both oil and coolant cooled
Old 01-18-2020, 12:22 PM
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Originally Posted by cfarmd View Post
this is correct, but the turbos on my truck are both oil and coolant cooled
Not sure the coolant helps with operating temps, but removes heat from the turbo after it shuts off. Turbos used to significantly sludge up the oil in the turbo after you shut off the engine and the flow of oil stops.

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