i have a 2 mm metal head gasket
i recorded 150psi on all six with little to zero difference between cyl.

just checking

the manual says 142 psi with an exceptable difference of 14 psi

seems alright to me.. mine are usually between 150-160... so if they're all even and car still goes well... i'd say nothin to worry bout :)

note; when using synthetic oils your compression readings will drop slightly,but as long as all preasures are within the perameters,it's all good.this does not mean however that you will loose power.

i use synthetic