So today I decided to do an oil & filter change on the 250 at 48,460 miles ( 4,072 miles since last oil change) and while I was waiting for oil to completely drain I decide to have a peek inside the air box to check air filter ( all was fine, again only done 4k) but then noticed that if I removed the air box base I could easily remove and inspect the offside VVT oil filter in the side of the head. I was amazed how clean it was because I guess it has never been out from new! Goes to show that low mileage oil changes are really beneficial. Oil is cheap compared to engine problems!
picture is as it was removed, not cleaned!