My name is Yasin Aldav and I bought myself a beloved subie two weeks ago. Only the subie is new ground for me because of the boxer engine. Here at Motortalk I am still newcomer only a week ago. Now back to the topic. As it is also in the title it clacks, but it is no pleu bearing damage or piston tipper. could it be because of the tilt lever? Can it also be because the engine oil is too thinly liquid (I “drive” 10W40) well the next oil change is due because I wanted to try 10w60. Is that all right ? I got the spark plugs out and they looked like if the car would drive too thin or the heat value would be too low because I drive NGK with heat value 5 are all right or should I rather drive NGK with heat value 6 ? Sorry for these many questions but I want my subie to be very good looking forward to the coming information