Sometimes It Smokes, Sometimes It Doesnt

[Takentoxs 1]

Yesterday at my local autosolo my xs began running terribly, stalling, cutting out, Hugh idle then no idle loads of blue smoke, but less when I put some more oil in. Drove home perfectly. I started it this morning. No smoke sweet tick over. Took it for a good thrashing, again perfect. What is going on?

[toolie72 67 1 Cars]

Oil surge?

[Takentoxs 1]

Don't think so. It just gradually smoked less throughout the day. One of the marshals asked me if I was running low on oil at one point as he had spotted that it was smoking less. I did a compression test last night. 180-190 psi across the 4