To add on...Clementi, Bt Merah, Bt Batok, CCK, Hougang and Eunos
feeders start to have Volvo MK2s after the progressive withdrawal
of Volvo B57 buses with the purchase of Volvo MK4s in 1995. Toa
Payoh, Bedok, Tampines and Pasir Ris feeders had the Scania N113
CRB replacement instead.
Service 170 started to have progressive Volvo B57 
Volvo MK2 WA redeployments only in early 1993. In 2001,
all switched to Volvo MK3 AC buses overnight 
Not sure about service 177 and Bt Panjang feeders though, they
still had Volvo B57s until these services were taken over by Tibs
in mid 1995. Not sure whether Volvo MK2 WA were used before.
Services 11, 77, 91, 151, 156, 191 started to have Volvo MK2s too
after these services were downgraded to PAC in 1998 
