88 5.0 fox body mustang. First oil change since I took possession of the car. Unknown oil out. The oil itself felt not like oil at all,as if there wasn't any viscosity left. And black like road tar.
So I drained it but left the filter,put in 4 litres of co-op d-mo 0w-40 hdeo and a litre of mmo. Ran it for a tank of fuel,drained it,again very black and refilled with a Walmart jug of pyb 5w-30 and half a litre of mmo. Going to run this for a few tanks,just to see how quickly the oil turns to mud again.
Once this flush out is finished I think I'm going to use the 5 litre jug of liqui-moly 10w-40 with mos2 already added,and see if fuel consumption is affected.
I love my 2000gt but there is nothing like the sound of a pushrod 5.0. It's like music to my ears.