- First Name
- Darryl
- Joined
- May 9, 2025
- Threads
- 13
- Messages
- 1,611
- Reaction score
- 3,611
- Location
- Tallahassee Florida
- Vehicle(s)
- 2025 Maverick XLT HYBRID
- Engine
- 2.5L Hybrid
Truth be told, most Ecoboost failures of the (mostly old design) 4 cylinder are rooted in cooling system failure rather than oil issues. We had some lubrication issues with 1st gen 3.5 EcoBoost. But when I looked at the history, most had gone BEYOND the recommended intervals or used conventional oil instead of synthetic blend. Of course no harm is done by changing oil more frequently than required. It's just not required in most cases. Some also try to get by with low quality oil filters too. That will allow premature damage too. When I remove the valve cover for gasket replacement on most engines, there is usually no sludge as was common years ago in the era of oils meeting only the SE,SF, and SG standards. Most old engines didn't have oil coolers either.Following the OLM for the relatively simple 2.5L hybrid engine is probably fine, but there is a long, long line of ecoboost family engines that have had major issues rooted in poor design + oil change intervals that are too long. It's not just one thing though, it's a combination of decreased piston ring tension, turbocharging, and oil driven VVT and timing chains (or wet timing belts...). This issue isn't limited to Ford though, it's common with many engines that have gone down that path for more fuel economy at the expense of reliability.
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