These engines wear extremely well and don't need anything expensive to offer a long life cycle. Generally 10k mile OCIs are easily doable from the data I've seen. These engines suffer from a design concern in that the water pump is internal (inside cam chain cover) and if the outer shaft seal leaks, it will put coolant into the lube via seeping The Ford 3.5 V6 was released back in 2007 and is commonly known as the “Cyclone” or the “Duratec 3.5”. This 3.5 unit was first used for the Ford Edge and the Lincoln MKZ but later found its way into many other models.
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This Duratec 3.5/3.7 engine series is not at all picky about brand/grade of lube; they pretty much wear easily regardless what's in the crankcase (within reason, of course). If not for the internal water pump, these would be 400k-mile+ engines easily. As for wear, this engine is right in line with expectations for the exposure. Feb 15, 2020. #2. The 3.5 EcoBoost is a Duratec engine, just a GDI version of the 3.5 Duratec, so they. should use the same heads. Inside the head may be different, the DOHC cam setup for. the Mustang The 3.7 Duratec (code name Cyclone) is the N/A motor for heavy or premium vehicles. The stroke is the same as the DT 3.5, with a bigger bore. Yeah you probably best to go to a forum specific for your application. Although asking here doesn't hurt because you never know who might have done a similar build. I dont recall anyone building or swapping a 3.5 duratec, but i dont know everything. Good luck, sounds like a fun adventure When you get to the larger HR models, the difference is having the lower rear axle ratio on the EcoBoost than the 3.5L PFDI engine. In the RWD models, the difference can be getting the 3.31 ratio versus the 3.73 ratio or even the 4.10 ratio in the HR models. This gives you lower RPMs that can calculate to better fuel mileage. w8ruNH3. 777 272 443 773 314 765 694 573

is the 3.5 duratec a good engine