hi ghosthunter.

thanks for the quick reply. I have done some calling also last night after I posted my message.
here's what i found out:

1. the Bureau of Product Standards has already prepared a standard to regulate the quality of LPG as autofuel.
2. This however still does not cover the quality of the conversion kits
3. last year there were only about 108 converted taxis as of Sept 2005 compared to an estimated 5,000 as of July 2006 (SMS of Len B to a friend)
4. LTFRB has plans to provide an incentive of longer terms for their franchise if they convert to LPG.

now, in response to your replies.
1. you are correct. condition of a vehicle still plays a lot of role when it comes to emissions. (which is why we have been pushing for an MVIS in DOTC and an Inspection and Maintenance (I and M) here).. anyway, but given two vehicles or engines of same type and condition, LPG produces lower emissions of air pollutants (particulates, CO and HC).. except for NOx I think.

2. in all other points, i am in full agreement.

It struck me that maybe it would be good to compare the "achievements" in the LPG sector vs CNG. The CNG sector had a lot of investments and planning etc involved but nothing much has happened until now. The plans remained plans.

you have pictures of LPG-converted cars in the country? I would appreciate receiving them. With your permission, I'd like to use them in my presentation. Thanks.
May