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Originally Posted by GTO Incorrect. Extensive research has shown that CNG burns much cleaner, and actually leads to less engine wear. Am providing just one link, but a search on google will take you to plentiful more reliable sources : Energy.Gov link |
Incorrect.
http://cng-lpg-conversion.com/Why-CNG-LPG.asp
Check the table for maintenance costs. It says CNG causes 30% increase in maintenance vs LPG which reduces maintencance costs by 5%.
http://www.automonitor.co.in/col_dis...ch.asp?code=43
"A comparative study of the two gas-based fuels vis-à-vis diesel and petrol shows that LPG gains over CNG on several counts. The impact on greenhouse emissions is considerably less than other fossil fuels when measured through the total fuel cycle. Moreover, for the same volume, LPG requires a tank that is one-third the size of a CNG tank. “LPG is a clean burning, high octane, environment friendly fuel. It generates no smoke or fumes and emits extremely low levels of Carbon Monoxide, Hydrocarbons and Nitrogen Oxides. It emits virtually no sulphur oxides and no particulate matter,” a highly placed source in the industry said.
Vehicles that run on CNG experience a reduction in engine power by up to 20 percent, primarily due to gas carburettors. On the other hand, LPG can be used in a way similar to diesel, with liquid sequential multi point fuel injection (MPFI), say experts. In a normal CNG tank, with the reduction of quantity, engine power comes down significantly. So, to maintain engine power at optimum levels, pressure-creating systems are installed, which leads to the increase in conversion cost."
http://www.indiacar.com/index2.asp?p...ank/lpgcng.htm
"LPG is acknowledged all over the world as an alternate fuel for Automobiles superior to conventional Gasoline/CNG."