Optimax question?
09 April 2006, 11:59 PM
#3
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You will get better fuel consumption on Optimax which will more than likely outweigh the extra cost per tank, assuming this is a question relating to the financial side of things 
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10 April 2006, 08:00 AM
#10
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Originally Posted by RSTurbo50
Im about to buy a 99 UK Model Impreza Turbo.......
Does the car need to run on optimax/super unleaded or can you use normal unleaded petrol?
Stu
Does the car need to run on optimax/super unleaded or can you use normal unleaded petrol?
Stu
10 April 2006, 06:44 PM
#11
Scooby Senior
The MPG increase won't nearly be enough to run SUL particularly Optimax.
My car certainly leaves me better off when i use SUL.
I posted this 4 years ago on this very subject
A few weeks ago there was a debate with regards to SUL and will there be a mpg improvement. I have used it for the last 7 tanks.
On normal unleaded i was averaging about 18.8mpg. After allowing 3 tanks for the ecu to reset itself i am now averging 20.8 mpg. By my thinking thats an improvement of 2 mpg.
So if i fill with: unleaded. 13.2 gallons at £3.40 = £44.88
: SUL . 13.2 gallons at £3.59 = £47.39
It costs £2.51 extra for the SUL. But if i'm getting 2 mpg gallon more then 2 x 13.2 (gallons)=26.4 extra miles per tank of SUL which is a gain of about 1.27 gallons.
So 1.27 gallons of normal unleaded is £4.32 Take off the extra which SUL costs per tank (£2.51) and i have a gain of £1.81 per tank.
On normal unleaded i was averaging about 18.8mpg. After allowing 3 tanks for the ecu to reset itself i am now averging 20.8 mpg. By my thinking thats an improvement of 2 mpg.
So if i fill with: unleaded. 13.2 gallons at £3.40 = £44.88
: SUL . 13.2 gallons at £3.59 = £47.39
It costs £2.51 extra for the SUL. But if i'm getting 2 mpg gallon more then 2 x 13.2 (gallons)=26.4 extra miles per tank of SUL which is a gain of about 1.27 gallons.
So 1.27 gallons of normal unleaded is £4.32 Take off the extra which SUL costs per tank (£2.51) and i have a gain of £1.81 per tank.
10 April 2006, 06:55 PM
#12
Originally Posted by bluepolarbear
The car, by law, came designed to run happily on 95ron. So if no mods it is fine. SUL may give a feel of better pick up but it won't translate to more than a couple of tenths in terms of real speed. The MPG increase won't nearly be enough to run SUL particularly Optimax.
Read the manual...it's more specific.
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