Smoky when accelerating

[Newn]

Hi all

I have a 2015 Forester XC Premium. It's done a smidge over 37k miles and it emits quite significant amounts of smoke when accelerating, either from rest or on the move e.g. when overtaking. I spoke on the 'phone to a Subaru dealer technician who suggested changing all filters, particularly the oil and fuel filters of course. This was done at its last MOT / service but it hasn't solved the problem. Anyone have any ideas?

Edited August 29, 2019 by Newn
spelling error

[Jay762]

What colour is the smoke - blue would indicate oil from valve stem seals, black is more likely running rich - whiteish is coolant being burnt.

It may be my ignorance but I cannot see how changing the oil filter will affect exhaust smoke?

[Newn]

Thanks Jay. The smoke is whiteish. What would be causing it to burn coolant, if that's what it is?

[Sandals]

That's potential sign of a head gasket failure. How are the coolant levels? Any overheating?

[Newn]

Nope. Coolant levels are fine and there is no overheating, including on a long run and in long periods of stationary traffic. Weird, huh?