Hi all .....
i saw an article on a newspaper sometime back and it was saying that a PETROL vehicles are more dirtier than diesels !!! (Ignore those buses, lorries, other poorly maintained vans & cars)
so i did some google found these articles on web ....
http://www.everymilesamemory.com/diesel_fact_page.htm
http://www.autotrader.co.uk/CARS/buying/diesel_or_petrol.jsp
---------------------------------------- from autotrader ---------
Petrol
Still the best choice for performance when driving, petrol is the most popular fuel with motorists across the UK.
Pros:
• Responsive
• Quieter than diesel
• Petrol engines are generally cheap to repair
• Faster revving
Cons:
• Petrol engines are less environmentally-friendly than their diesel counterparts
• It’s non-renewable
• Produces more CO2 than other fuel types
Each type of petrol has its own research octane rating (RON). The higher the number, the better performing the petrol is. It essentially falls into four main categories:
1. Unleaded
The most common type of petrol, this has a RON of 95.
2. Super Unleaded
Much like unleaded, but with 98 RON it gives your vehicle better performance.
3. Leaded Four Star and Lead Replacement Petrol (LRP)
Leaded fuel was removed from sale back in 2000 and replaced by LRP. This fuel is basically 97 RON unleaded petrol with an additive to give the valve seat protection, which some cars need.
A valve seat is a surface inside a car’s engine, which rests against the air intake or exhaust valve when the valve is closed – so to stop it from moving out of place and possibly reducing the engine’s efficiency.
LRP is generally only used for vintage vehicles so is less common.
4. High Performance
Cleaner and more powerful than super unleaded, high performance fuels are also more expensive. BP Ultimate is currently the most advanced fuel in UK petrol stations, with 102 RON.
High octane racing fuels are available in specialist motor stores, with prices going up to £7 per litre for 110 RON types.
But the difference between super unleaded and high performance fuels is marginal and more obviously noticed in supercars and other high performance vehicles.
Summary:
Best for driver’s who enjoy optimal performance and a smooth ride.
Diesel
Diesel is becoming more popular, due to its efficiency benefits over petrol and its lower CO2 emissions.
Pros:
• Stays in each gear longer, helping with acceleration and reducing the need for gear changing
• High engine efficiency
• Lower CO2 emissions
• Some high performance fuels are available in diesel
Cons:
• Diesel engines are louder than their petrol counterparts
• Results in a less smooth ride
• More expensive than petrol by a couple of pence
• Higher Nitrogen Oxide (an air pollutant) emissions than petrol
Summary:
More environmentally friendly and economical for long distance drivers.
