Noticed that some refilling stations' lpg are cleaner than others. Check if your station have periodic cleaning schedule. We have noticed clogging (oil residue) injectors specially from stations with underground tanks.

If the injectors are clogged most installers would recommend a change of injectors and these are at least Php5K upwards depending on the brand. Valtek Italy has given us the authority to clean and recalibrate the injectors and this would be part of our warranty service.

Also just concluded conversion on a fleet of trucks to run on Recycled Vegetable Oil if anyone is interested