Skip to content
View in the app

A better way to browse. Learn more.

Thailand News and Discussion Forum | ASEANNOW

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Savings with LPG fuel vs Petrol

Featured Replies

Hi

On a 4 cylinder engine, and current prices of LPG and Petrol in Thailand. What kind of savings can i expect with LPG? 

For various reasons I will do a lot of engine idling as well (its a camper van).

 

Thanks

2 things.

 

1- LPG Cars need more fuel to run the same KM's as a Petrol Car. (I am not 100% sure, but I guess it's something like 15-20% more fuel compared to Petrol)

2- Does the Car already have the LPG. Conversion. If not also consider the price of this.

 

50 minutes ago, MJCM said:

2 things.

 

1- LPG Cars need more fuel to run the same KM's as a Petrol Car. (I am not 100% sure, but I guess it's something like 15-20% more fuel compared to Petrol)

2- Does the Car already have the LPG. Conversion. If not also consider the price of this.

 

It is 10% more LPG. Or you could say/think that the engine is 10% weaker with LPG.

As a previous poster has said, 15-20% increased fuel consumption.

 

I can't speak for the cost of LPG conversion in Thailand, in Australia IIRC I recouped conversion cost in about 3 years. It depends on yearly kilometres of travel.

 

LPG makes for higher cylinder head temperatures, and has no lubricant properties as petrol and diesel do. I used to run the system on the basis of one quarter of a tank to every tank of LPG.

 

Complete conversion to LPG would be risky, unless the engine valve seats are specially hardened. Better to stay with a dual fuel system.

2 hours ago, Captor said:

It is 10% more LPG. Or you could say/think that the engine is 10% weaker with LPG.

I never noticed any difference in power with LPG, an old auto NV 

O-100klph 8.3 seconds on LPG with A/C on 2up.

2 hours ago, Lacessit said:

As a previous poster has said, 15-20% increased fuel consumption.

 

I can't speak for the cost of LPG conversion in Thailand, in Australia IIRC I recouped conversion cost in about 3 years. It depends on yearly kilometres of travel.

 

LPG makes for higher cylinder head temperatures, and has no lubricant properties as petrol and diesel do. I used to run the system on the basis of one quarter of a tank to every tank of LPG.

 

Complete conversion to LPG would be risky, unless the engine valve seats are specially hardened. Better to stay with a dual fuel system.

They are all dual systems, LPG conversions start on petrol no petrol and it won't start, as for 'higher cylinder temperature' overhead cams don't seem to have a problem.

I had a conversion done 9yrs ago never had a problem with it, Fuel prices have changed but to fill with petrol *at the time* was 1,000bht LPG was 500b well worth it the 20k conversion paid for it's self in 18mths , The only downfall i have now is every year when the vehicle test is due it has to have an LPG test at a cost of 1,500 B !!  and next year a new tank required after 10yrs. And of course on idle no CO2 fumes is a big benefit. There are 2 different tank choices Donut that fits your spare wheel space or a normal tank.

1 hour ago, brianthainess said:

They are all dual systems, LPG conversions start on petrol no petrol and it won't start, as for 'higher cylinder temperature' overhead cams don't seem to have a problem.

Some vehicle manufacturers have cars which are dedicated LPG, without a petrol tank in sight. AFAIK they start on LPG without petrol assistance.

They should, the flash point of LPG is lower.

On the vehicles I had converted, there was a bailout which enabled starting on LPG if the petrol tank was empty.

IIRC, cylinder head temperatures are 300 C for petrol, 400 C for LPG. CNG is even higher at 600 C.

I'm not sure what overhead cams have to do with valve seats, except for being connected via the valves.

10 hours ago, CrossBones said:

(its a camper van)

Diesel engine swap best. 

Create an account or sign in to comment

Recently Browsing 0

  • No registered users viewing this page.

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.