Be confident in everywhere you go to, Siam Diesel Parts & Service and alliances are located through out Thailand.
There are many other extended services such as:

Bangkok Siam Diesel Parts & Service 130/20 Rama3 rd. Chongnonsri Yannawa Bangkok 10120
Tel. 0-2294-2206-7
Kanchanaburi Jaroon Diesel 138-140 Sangshotoe rd. Thareau Tharmakar Kanchanaburi
Tel. (034)561139, 636906
Saraburi S-nga Diesel 105 Thanon Phahon Yothin rd. Park preaw Muang Saraburi
Tel. (036)223324, 211623
Rayong Rayong Diesel 360-13-14 Sukhumvit rd. Nernpra Muang Rayong
Tel. (038)612880, 613282
Chiang Mai Chiang Mai Diesel 410 Chiang mai-lumpang rd. Nongparkrung Muang Chiang Mai
Tel. (053)3241677, 3241177
Phitsanulok Mekarn Diesel 599/19 Mitrapap rd. Naimuang Muang Phitsanulok
Tel. (055)244525, 081-4740270
Surat Thani Thani Diesel 118 Surat-Nakornsri rd. Bangkung Muang Surat Thani
Tel. (077)283058, 284893
Udon Thani Bamrueng Diesel 151 moo9 Taharn rd. Muang Udon Thani
Tel. (042)222392, 340397
Ubon Ratchathani Nakhon Diesel 120 Jangsanit rd. Muang Ubon Ratchathani
Tel. (045)255297
Surin Nakhon Diesel(Surin) 187-188 moo13 Norkmuang Muang Surin
Tel. (044)531581