Join Date: Jun 2002
Location: USA & Singapore
Ferrari Life Posts: 5,509
I wouldn't panic. 42 psi is fine at idle. There are differing thoughts on oil for the Ferrari. Some swear by the synthetics, others swear by the petroleum-based oils. I am of the latter. The petroleum-based oil will cause the rubber in the seals to swell, if you change to a synthetic, the seals will shrink and leaks will develop. I change my oil religously and I use 20W/50 oil made by Valvoline. I also add a quart of Lucas Oil Stabilizer at each oil change.
Since you did not have this problem before switching to the synthetic, I'd go ahead and change the oil to just straight 20/50.
'79 308 GTS, '82 Jeep CJ7 Jamboree
"Time is what prevents everything from happening all at once."