you ran your car around with oil flush in the engine for a whole tank.
are you mad

you are mean't to 'idle' it for around 20mins, 15mins fast idle on it, THATS IT!!!
as it thins the oil right down to basically piswhwater.
I would say your engine DID NOT enjoy that
hope you didn't pay much for it, as its sound'd like it hasn't been loved in a while (typical of cars that have been bought thru garages, i/e traded in at dealership for something, then moved onto auctions, then to a used car dealers where it can sit for upto a year).
there is this mk2/b 1.3jtd punto near me, with low milage, but its been there over 8month now, and at same price, so I am not interested in the slightest at it (oil has curdled and it pulls to the right horribly (seizing wheel bearing I wouldimagine), and its starting to smell inside from damp and various leaks and general lack of use.
