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88 posts

Master Geek


  # 1199840 18-Dec-2014 12:02
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http://www.aa.co.nz/membership/aa-directions/driver/fuel-duel-mineral-fuels-vs-bio-blends/

T
o those saying Gull is a better deal. Plus, you need to be sure they are storing the fuel correctly, or it can screw your engine. I'd rather pay a few cents more and get more mileage for it than risk spending thousands replacing the engine and have to take the bus in the mean-time.

Secondly, the calculation in the first post that you only save a dollar doing it one way or the other doesn't sound right. Over a two month period with one $40 refill per week (the maximum you can save your discounts before you need to cash it in or lose it) at $2pl:

4c pL off $40 x 8 = 4c pL off $320 = $307.20 : $12.80 saved

0c pL off $40 x 5 = 0 plus 24c pL off $120 = $91.20 = $28.80 saved. 

If this is confusing, you should be saving your discounts from the start of a month to the end of the following month, where you run yourself to borderline empty and fill up as much as you can. This will carry you through into the start of the new month about 3x further than your usual $40 spends, so we don't calculate for 7x weekly $40 spends and one full tank (which would happen in the first month only)- we calculate the following months in which we didn't need to buy fuel for the first two or three weeks (after filling the tank with discounted rate). 


That fill up saved nearly $30, for the two month period, while the other method of cashing it in every week/top up saved us less than half that amount. It takes maybe two minutes extra to do it this way, and saves $15 more. I don't get paid $7.50 a minute so that's a good rate and worth my two minutes.

2514 posts

Uber Geek
Inactive user


  # 1199863 18-Dec-2014 12:29
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b0rg: http://www.aa.co.nz/membership/aa-directions/driver/fuel-duel-mineral-fuels-vs-bio-blends/

T
o those saying Gull is a better deal. Plus, you need to be sure they are storing the fuel correctly, or it can screw your engine. I'd rather pay a few cents more and get more mileage for it than risk spending thousands replacing the engine and have to take the bus in the mean-time.

Secondly, the calculation in the first post that you only save a dollar doing it one way or the other doesn't sound right. Over a two month period with one $40 refill per week (the maximum you can save your discounts before you need to cash it in or lose it) at $2pl:

4c pL off $40 x 8 = 4c pL off $320 = $307.20 : $12.80 saved

0c pL off $40 x 5 = 0 plus 24c pL off $120 = $91.20 = $28.80 saved. 

If this is confusing, you should be saving your discounts from the start of a month to the end of the following month, where you run yourself to borderline empty and fill up as much as you can. This will carry you through into the start of the new month about 3x further than your usual $40 spends, so we don't calculate for 7x weekly $40 spends and one full tank (which would happen in the first month only)- we calculate the following months in which we didn't need to buy fuel for the first two or three weeks (after filling the tank with discounted rate). 


That fill up saved nearly $30, for the two month period, while the other method of cashing it in every week/top up saved us less than half that amount. It takes maybe two minutes extra to do it this way, and saves $15 more. I don't get paid $7.50 a minute so that's a good rate and worth my two minutes.


Gull 98 is over 10% cheaper at the pump, so the 3% more fuel theoretically used is a moot point

Actually I paid around $1.90/ litre last fill compared to $2.249 for BP

My car is approved to run on 10% blend so I am OK.

 
 
 
 


3169 posts

Uber Geek

Subscriber

  # 1199878 18-Dec-2014 12:53
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91 is down to $1.69.9 at most places in Whangarei!

88 posts

Master Geek


  # 1199974 18-Dec-2014 14:17
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dickytim: 

Gull 98 is over 10% cheaper at the pump, so the 3% more fuel theoretically used is a moot point

Actually I paid around $1.90/ litre last fill compared to $2.249 for BP

My car is approved to run on 10% blend so I am OK.


Seems like the old "biofuel = seized engines" story is a myth too: http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=10502844

However in looking for a definitive answer, I learned that biofuel may be worse for our health, contributes to rising food costs, and is worse for the environment in the long run.

We need solar power!


8873 posts

Uber Geek

Lifetime subscriber

  # 1200053 18-Dec-2014 16:41
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b0rg: http://www.aa.co.nz/membership/aa-directions/driver/fuel-duel-mineral-fuels-vs-bio-blends/

T
o those saying Gull is a better deal. Plus, you need to be sure they are storing the fuel correctly, or it can screw your engine. I'd rather pay a few cents more and get more mileage for it than risk spending thousands replacing the engine and have to take the bus in the mean-time.

Secondly, the calculation in the first post that you only save a dollar doing it one way or the other doesn't sound right. Over a two month period with one $40 refill per week (the maximum you can save your discounts before you need to cash it in or lose it) at $2pl:

4c pL off $40 x 8 = 4c pL off $320 = $307.20 : $12.80 saved

0c pL off $40 x 5 = 0 plus 24c pL off $120 = $91.20 = $28.80 saved. 

If this is confusing, you should be saving your discounts from the start of a month to the end of the following month, where you run yourself to borderline empty and fill up as much as you can. This will carry you through into the start of the new month about 3x further than your usual $40 spends, so we don't calculate for 7x weekly $40 spends and one full tank (which would happen in the first month only)- we calculate the following months in which we didn't need to buy fuel for the first two or three weeks (after filling the tank with discounted rate). 


That fill up saved nearly $30, for the two month period, while the other method of cashing it in every week/top up saved us less than half that amount. It takes maybe two minutes extra to do it this way, and saves $15 more. I don't get paid $7.50 a minute so that's a good rate and worth my two minutes.


your maths is miles off

if you accumulate 6 lots of 4c savings its a saving total of $0.24. but its only valid on 50L, so $0.24x50 is only $12 saving not $28.80 like you have said

if you used your 4c each time you would save $0.80 on a $40 purchase, over 6 fill ups its $4.80. But why would you only fill up with $40 each time if you were using your saving each time? you will fill up a whole tanks worth.

there is not a huge financial gain from filling up in chunks of $40. On a smaller car (less than 40L tank) that does 20,000km maybe $90-100 a year

5385 posts

Uber Geek


  # 1200348 19-Dec-2014 09:23
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Solar power technology is OK.  If there was appropriate, economical battery technology for homes (storing daytime solar surplus) and cars, solar could be effective.


We need solar power!





Mike

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