'Petrol efficiency experiment; an increase of 20%' blog discussion
Comments
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caretakerPete wrote: »When I drive I aim to not have to use the brakes, I find this helps greatly, you are always consious of your speed because you have to think ahead, you tend not to drive too close to the car in front, you are constantly aware of the need to slow down at junctions etc and you save on wear to the braking system as well as becomming more confident and calm.
A quick counterpoint though: brake lights are a warning to cars behind, so using your brakes to illuminate the lights is useful even when you don't actually need to brake yourself. Also repeated engine braking can cause wear to the engine, so should be used moderately (as I'm sure you do) instead of as a replacement for brakes. My driving instructor said, "Which is cheaper to replace: brake pads & discs or a whole engine?"Jumbo
"You may have speed, but I have momentum"0 -
you cannnot accuratley judge fuel efficiency by volume guys and gals, sorry, petrol increases and decreases in volume according to its temperature, the only way to accurately judge fuel economy would be to weigh the fuel in the tank before and after the test period, trip computers in cars arent too good either, putting a different set of wheels/tyres on your car can make a huge difference to the reading also as your changing the outer circumference of the wheels
Providing you are using normal retail outlets that store fuel underground, which reduces temperature variation, and fill up at the same time each day and at the same time of year you would struggle to get a difference of 0.25% in mass of fuel delivered due to temperature related volume changes.
Probably accurate enough for the purpose of this experiment.US housing: it's not a bubble
Moneyweek, December 20050 -
Easter is not to celebrate his death but his rising from death.
He died on Good Friday not Easter Sunday (when we have the Easter eggs)!
Re. the petrol saving discussion. I always drive taking my foot off the accelerator when approaching roundabouts etc. and am constantly amazed at the number of cars bombing past me and then slamming on their brakes at the last minute. Some also brake at any changes ahead such as a slight curve in the road, cars way in front of them and even traffic coming in the other direction. I believe they think that they either have to have their foot on the accelerator or brake, such a waste of petrol!0 -
Errrm, a slight mathematical difference about what Martin said:
Going 20% further on a tankful means the rate of consumption, and hence the cost of a fixed length trip or of all fuel bought, drops by 16.7% not 20%
To make the point clearer by stretching things, going 100% further on a tankful is a 50% cost saving
Many countries define fuel consumption in units that are reciprocal to the way we do, e.g. in litres per 100 km, and maybe that's why0 -
Interseting post as I've been thinking a lot about fuel consumption. I travel a lot between SWest and London. I noticed that if I took the motorway my consumption increased (driving around 70 mph) whereas on the 'old road' up it was averaging 60mph so was more fuel efficient.
Also I purchased a tomtom last year. I keep experimenting with the 'shortage' route versus the 'fastest' route. Sometimes the time different isn't much but I save around 5 miles in distance. Though in the country you do end up going down some little roads! Has anyone else tried this method to save mileage?
My next plan is to calculate how much it costs me to drive a mile, will get around to that soonPrevious debt: £14K :embarasse Debt free: Sept '03 MFW#42 Mortgage OP savings £4271.18/£12000 2019 Started dating OH Mar '12, married Oct '12, Walnut born Dec ' 12 :A SPC 12: 99 £38.05/£500 Make money Jan: £412.34/£310 :T Feb: £88.79/£280 May: £215.52/£310 June: £18.98/£3000 -
I have 'experimented' this week by driving more sympathetically and carefully than I normally would and although I don't have a fuel consumption readout on my car, I have found that I haven't used as much fuel as I normally would in a normal working week!
I fill up at a BP garage which luckily has to price match with an Asda station over the road, otherwise it would be out of business!0 -
and also driving at the speed quoted by your car manufacturer as having the best MPG, usually about 56mph, instead of 70 or 80mph on the motorway.
56mph is often quoted because this is a standard used to give a common comparison point, it is not the speed at which cars exhibit the best mpg.loose does not rhyme with choose but lose does and is the word you meant to write.0 -
For info, this is also being discussed over on the Advanced Driving UK site at
http://www.advanced-driving.co.uk/bb/viewtopic.php?p=29301#29301
Some interesting tips on fuel economy http://www.advanced-driving.co.uk/driving-tips/put-the-car-on-a-low-fuel-diet-for-2008/
You might also find the fuel economy spreadsheet useful to calculate your own fuel ecomony
http://www.advanced-driving.co.uk/public/fuelecon.xls0 -
Interseting post as I've been thinking a lot about fuel consumption. I travel a lot between SWest and London. I noticed that if I took the motorway my consumption increased (driving around 70 mph) whereas on the 'old road' up it was averaging 60mph so was more fuel efficient.
Also I purchased a tomtom last year. I keep experimenting with the 'shortage' route versus the 'fastest' route. Sometimes the time different isn't much but I save around 5 miles in distance. Though in the country you do end up going down some little roads! Has anyone else tried this method to save mileage?
My next plan is to calculate how much it costs me to drive a mile, will get around to that soon
It also means that the shortest route is seldom the most economical, as it usually involves lots of junctions and minor roads. (Unless you're travelling on a bicycle, of course, where the cruising speed isn't very high, so distance is more important than cruising. )Jumbo
"You may have speed, but I have momentum"0 -
I seen a product in the garage called Redex which is reputed to save up to 20% of petrol when it is put in the tank.
Does anyone know if this stuff works?
Lynne.0
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