2010 Subaru Forester 2.5X 4dr SUV AWD (2.5L 4cyl 4A)
I go out in the morning start my Forester and it sounds like a diesel! After a minute or so of warming up it quiets down to a normal sounding gas engine. It seems that over night the oil must run off the major parts and in the morning when I first start it up it sounds like a diesel! I would have to say the engine is starving for oil, possibly or the oil is not heavy enough. Took it to the dealer they say they hear nothing out of the ordinary. Also, there is a loud whine from the rear end when applying the gas. And again the dealership could not hear this either.
Like the AWD & the breaking system and the interior room.
I would improve the excessive noise when first starting the engine. Also, the hood latch opening with a gasket to keep the weather out of the engine compartment. Radio. Correct the loud whining coming from the gears in the rear end.