Subaru euro 4

I’ve exactly the same experience. I have a euro4 2009 version. Yes it’s loud when cold by once slightly warm it’s quiet and smooth. Now past 100000 miles, I change the oil and filter every 6000 miles, it just keeps on going. I bought it on 62000 a few years back and I love it. Never lets me down. Oil dilution reset every oil change, no issues whatsoever.

The movement in the belt tensioner is more than likely due to the alternator clutch pulley gradually seizing . Easy and cheap to replace.

Hi Jaja - check all pressure hoses from the turbo through to the inter cooler and then the small pipe from the inter cooler to the throttle intake manifold. It could be that you have a split in one or few of them meaning that it’s over fueling as it thinks it’s getting more air than it is into the engine. Take them all off and have a good look. Easy enough to do👍🏻

Hi all, new to this and Subaru. I have a UK spec Forester Diesel, year 2009. I presume this is a Euro 4 emission spec. I have just completed an oil service and am trying to understand whether my model needs an oil dilution reset. Could anyone help on here? If so, how is this carried out? Thanks all