ULP v PREMIUM
Submitted: Monday, Feb 13, 2006 at 18:03
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Eddy
Hi All.
Some time ago I seem to remember seeing something on TV about good mileage from premium unleaded fuel.
Any how, the family car ( a fuel injected magna) gets a run to town about once every 2 weeks (220km round trip) and the fuel consumption has got noticable bad.
The car runs fine if a little gutless but is in good tune and condition.
I was going to put a bottle of injector cleaner in but at the last minute thought I would try premium ulp instead as I had heard it cleans the motor up.
I have put 1.75 tanks of this in now & the difference in economy & power is very noticable.
I won't be going back to standard ulp any time soon.
Has anyone else had a good result like this or is our car a one off?
Eddy
Reply By: Member - Des - Tuesday, Feb 14, 2006 at 15:12
Tuesday, Feb 14, 2006 at 15:12
We have a TS Astra and 95 series Prado. Now running both on 98RON PULP. Both cars certainly run better. The question is whether it is worth the extra 10c/L over standard unleaded (about 8% at current prices).
This article at lcool.org argues that you can get substantially better fuel economy (as much as 15%) in 3.4L or 4L Prado using high octane petrol, but you need to persist for as long as maybe 7,000km. The theory is that the engine retunes itself to the higher octane, but only very slowly.
I am about 6,000km into the experiment, with one lapse to 95 RON when 98 wasn't available. At the start averaged about 14L/100km; last tank averaged 12. If sustained, that's about 14%. But it is a bit early to say definitively.
My brother has a BA Falcon ute and he has had good results with
United's 98 RON + ethanol blend, called Boost.
But I'm sticking with pure 98RON. Unfortunately in Victoria it is only available from
Shell or BP, not
Caltex (yet). (Which means Coles vouchers are useful, but Safeway/Woolworths are not.)
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