January 28, 2010 at 11:06 am #251249
I try to use the car as little as possible but with 4 kids, we do have a large people mover which seems to go through petrol like you wouldn’t believe. I am hoping in the future to buy some sort of hybrid, but until I can afford that, which petrol is the best?
In every petrol station, there is at least 2 or 3 different unleaded petrol options, at varying prices. High Octane, super unleaded, unleaded 95 amongst other things. Is there a difference and are any better for the environment than others?January 28, 2010 at 11:40 am #451814
:shrug: Have no idea really, I don’t think any are “better” for the environment for obvious reasons – taking out the lead was the best thing they did but the differences lie in the wear and tear on your vehicles engine/fuel efficiency etc. so if you want to break it down and figure out which one is best for the environment in those terms then let me know what you come up with – me, I buy standard ‘no frills’ unleaded petrol and use it as little as possible. We have a station wagon with extra seats in the rear that can be folded up if required. We don’t go far in it unless there is a wedding in Melbourne or something (very rare let me tell you!) and try hard to stick to one trip into town a week in that car, hubby has a job in town so he picks up bits and pieces all the time, not always practical with kid school events and appointments but we try:rol:January 28, 2010 at 12:02 pm #451815
According to SIL who was in marketing for a major car company high octane is only really worth it in a high performance car.
Our Prado cost more to run on the cheaper 95 type unleaded if thats any help.
I think it is a bit dependant on the car you driveJanuary 28, 2010 at 6:38 pm #451816
hmmmm dunoo we changed to tha tsuper stuff called v-tech i think at shell and we do fill less often and the car has that bit more grunt, by our rough calculations it is saving us $5 to $10 per week on the fuel bill.
feel if we keep bagging fossil fuels, it is all we/ve got and the only vehicles anywhere in our futures need to run on it, if we keep bagging it we are going to play into their hands and under the environmental concerns they will slug us at the bowser for no other benefit than extra profit, by all means economise and use vehicles efficiently but if you have special vehicle needs then i can’t see anything that will be affordable on the drawing boards for anytime yet.
instead of bagging we should be putting preassure on for affordable vehicles run on alternative fuels (realy can’t see batteries ever being more than shopping cars), instead of subsidising gas(which isn’t finite and they won’t let private car owners use natural gas as there is no excise on it, and if they did like butane it would be more expensive for home use.) conversion why aren’t they into having those hydrogen units fitted to all cars, one unit lessens fuel use by around 15% i’ve been told?
life is getting harder and harder for the poor now what is wanted that you need to have certain bank balance to own and drive a car??
lenJanuary 28, 2010 at 8:24 pm #451817
I have always found the lower octane just rubbish and refuse to use it and that other ethnol stuff from sugar cane will wreck your motor.
DennisJanuary 28, 2010 at 8:44 pm #451818
I have both diesel car (mazda) and an unleaded 4wd (mitsubshi) – dont ask me why both cars, my DH insisted on it. I’ve stopped buying any other petrols after reading the book ‘Omnivore’s Dilemma’ – enthanol may be the worst thing after or before fossil fuels, IMHO.
I plan my trips so it would be a circular trip every two days or longer if possible. I am hoping to buy a hybrid car next year or two when my DH decided to swap cars then.
I understand that if you buy octave or premium petrol, it is better to use it for long trip as it goes slowly, much more than any other petrol except for diesel of course.
However I am definitely curious what others thinks too.
Cheers! :hug:January 28, 2010 at 9:38 pm #451819
Yes most of the people I know say they get better milage out of premium grade and it saves money in long run and I would agree with that. It may cost a little more but the savings are much better.
DennisJanuary 28, 2010 at 11:37 pm #451820
Why not do the tests?
If you have a regular route that you drive you can measure it out. It will take a while as you must make sure that you get enough data for it to make sense.
i.e. fill up with a certain type for five or ten trips and work out the mileage. A calculation of litres per hundred kilometres or mile per gallon is good.
Make sure you take the average over the trips for each type of fuel and have a changeover period that doesn’t get included in the results.
Things that will effect the type of fuel that will work for you are:
– type of car and therefore type of engine, performance engine, weight of the car etc
– style of driving – the way in which you drive your particular type of car in the conditions (like hard acceleration, whether you coast or are either on one pedal or the other all the time etc)
– the type of trips that you take – city traffic with stop/start or country driving
I think that all of these will be factors in choosing which fuel to buy.January 29, 2010 at 1:47 am #451821
if you pump your tyres 5-10 psi over recommended you also get better mileage.
Fat, low profile tyres are a big killer of fuel economy
Len: “saving us $5 to $10 per week” that is our usual weekly fuel billJanuary 29, 2010 at 2:28 am #451822
Anja – with 20 + years of experience in petrol stations, I frequently listened to customers telling me that they got better performance and more k’s using the high octane fuel. When I used to use it, I found the same but now I just use the normal unleaded. I don’t care about more grunt.January 29, 2010 at 3:05 am #451823
df418 over inflating tyres will give you a fuel saving, it will also give you a harsh ride, uneven tyre wear, poor braking and cornering, as the tyre is not contacting the road properly.
MaxJanuary 29, 2010 at 4:09 am #451824
Bala: Uneven wear? get the tyre guys to over inflate when you buy them and balance them at the higher psi
Harsh ride? depending on the roads
poor braking? if you are driving to conserve fuel you should hardly touch the brakes
cornering? have you every watched production car racing? they take stock standard cars and inflate to 60psi then go hammering around the race track. surely you are not driving like this??January 29, 2010 at 9:12 am #451825
My tyre place always recommends over-inflating by about 4 for better tyre wear and performance and fuel economy.
edited to add – although my tyre specialist who probably know alot more than me recommend 4 above, I veer on the conservative side and inflate only 2 above.January 29, 2010 at 11:20 am #451826
Tyres need to be inflated to the correct! pressure to suit the vehicle and its load, this may be higher or lower than that stated on the tyre placard on a car. This will give you the best handling, braking and ride.
I would simply like people who read this post to be aware that putting an extra 5 or 10 psi in tyres needs to be done with due respect to the changes it will make to a car apart from fuel economy.
If the tyre dealers recommend a hihger pressure that is fine, but to just up the pressure for fuel economy is a different matter.
MaxJanuary 29, 2010 at 6:20 pm #451827
i’d ahve to go with bala,
tyre inflations recommended by the maker are for a reason, as the amount of tyre touching the road is about the size of the palm of you hand you need to keep that in mind that the tyre need equal pressure across that contact for breaking and cornering to say the least, even at city speed limits and breaking under normal driving conditions far different to sudden breaking or emergency breaking or in the wet(waht’s wet?) when you need the trye to work properly.
also if overinflation is done remember to knock that back down a bit before long trips as tha tyres are going to expand with that much more heat added. and could cause tyre failure under extreme conditions.
keep the vehicle well tuned and serviced will do more for economy. things like those dressy roof racks do more for less economy, keep the vehicle airodynamic.
and i think by law if you are involved in a serious accident that the police investigate they will be wanting to determine that your tyre pressures where within 10% (i think) of recommended.
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