A smoke emission test is no gaurantee for clean air.

@eileenleyva (13767)
Philippines
June 14, 2009 4:40am CST
Gosh, I registered my vehicle at the Land Transportation Office the other day and they required me to have a smoke emission test. They had been requiring that for the past seven or eight years but so far the streets are still filled with exhaust gas. Had they required a simple mandatory change oil and filter, the roads would have been a little fresher.
No responses