Ok so as the title says.... my oil pressure is going from 5-100psi and other numbers on my first start up after gasket replacement (head gasket and up) 5w-30 non synthetic oil. Erratic idle from 1500-700-200 and yhen shutting off. Car starts up great after it shut off.

Upon doing a slow test drive... no smoke or stalling or erratic anything till I go to turn around at thr end of my rd. Idle is crazy and I started getting white smoke/mist. Now I know that to be a symptom of coolant burning off but... it smells of oil and coolant. Pressure test up to 120psi and held that for 30 mins. Compression test shows 160-170 across all cylinders. No mixing of fluids. I let the car idle in my driveway for an hour to get the exhaust heated up great because when I removed all my coolant and oil lines from my cracked 16g... I believe some fluids got into the Downpipe. The mist clears up a lot after tge hour and Ieven rev just a bit and ill get a nice puff of mist then its very light. I have a stock exhaust with a cat and a regular cat at that so I know its a bit restrictive.

I have heard of a break-in period where I need to svoud boosting for a bit. Is this true and if so then how long is this period. This was my first minor rebuild so im excited to drive my baby again but I don't wanna blow it up.

I just want to know if this kind of first start-up symptoms are normal minus me dumoing fluid into my downpipe?