Dear Autopilot,
You have correctly heard that octane number of LPG is higher than petrol (112 LPG and 92 petrol).
As regards cost of kit with 60 Liter tank, it is around 20,000/- (Made by TESLA, Islamabad) with complete installation and tuning for better mileage.
I have recently got installed TESLA LPG kit in my Toyota Starlet 1000 cc model 1982. It is working fantastic and giving better mileage compared to petrol. Even the vibration and noise of the engine has complete gone and so noise-less that sometime I have to check by pressing the accelerator whether the car is switched on or not. I am totally satisfied with its performance. I advise members to get their vehicles converted into LPG autogas which is far better fuel as compared to petrol and CNG. In fact LPG is the fuel of today and future. It may be interesting to know that by LPG autogas there is very low carbon deposits and emissions. Besides this, there is a very smooth drive on LPG. It also prevents the engine from wear and tear as other fuels do.
I shall be available for any further information and assistance.
Syed Jawwad Hashmi
Cell Ph: 03212465998
Karachi