to many miles to switch to a synthetic oil with. Your engine seals are adapted to a regular or Synthetic blend oil, I dont know why exactly, but a Synthetic oil needs to be adapted to right from the start.
98 Corolla LE 1.8L DOHC 1ZZFE
TEIN H.Tech Springs
Tokico HP series Struts
Short ram air intake
Tsudo Axel Back Exhaust
... if a jelly fish stung me.. would you pee on the wound?