Never seen #s drop after squirting oil in cylinder. #4 being significantly low would lead me to suspect bad exhaust valve. IMO you really want to see triple digit compression, if not add new rings and a hone.
Toltec Coffee Team: www.ToltecCoffee.com
'99 UZJ 100 - for glamping and grocery getting
'94 FZJ80 - our Costa Rican coffee mule
'96 FZJ80 - 3XL, racked, shaved and dipped in Raptor coat
'70 Petrol SIIA 88 - a Costa Rican expat in US on HB-1 visa
'70 Petrol SIIA 88 - for Costa Rican surf & jungle exploration
'56 Petrol S1 86 - a whole new kind of land rover hell...