Fuel Debate RON Vs RON!

^ From the article, it depends on how many separate tanks the particular servo has, and I would also assume how it decides to use them, but blending is a commonplace.
 
The plot thickens.
My 2 cents worth...
Different RONs make stuff all difference to my MY03`s performance or engine sound.
Economy and price is the only difference between ethanol fuels and non ethanol fuels.
I now use an Australian made ECU every book service interval. Priced considerably less than SA457(?). It is called Air Intake and Upper Engine Cleaner manufactured by Austech Chemicals at Narangba in QLD. Costs $40 for 12 pressure pack cans or did 12 months ago.
This is in 311000 kms and no engine rebuild as yet.
 
Ratbag said:
^ From the article, it depends on how many separate tanks the particular servo has, and I would also assume how it decides to use them, but blending is a commonplace.
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Yes it is, at the refinery, not the servo. Well at least over here in WA it is.

Just to add and this is common practise with all servos, underground tank maintenance only happens if there is a product change for that tank, delivery stuff up or the tank is leaking thus involving the D.E.P (epa). Otherwise routine tank maintenance is non existent. Pump maintenance on the other hand is another story.
 
Gidday CY

I guess what comes out of all this is that things vary from place to place, and individual experience also varies.

Guzzla gave a pretty comprehensive summary of the major factors involved in fuel consumption upthread.

What it comes down to is that one would really need to do either multi-variate regression analysis or factor analysis on experimentally derived data to make any kind of real stab at the 'truth'! As this isn't likely to happen anytime soon, we can only be guided by our own experience/s.

One thing I am sure we can all agree on is that the government/manufacturer figures are usually figments of someone's vivid imagination ...

My own observation is that Roo2 doesn't even look like obtaining the figures quoted for suburban motoring, unless I am travelling across town on major roads. On the open road, it appears to achieve close to the advertised figure of the low to mid 7s. That's using 91 RON fuel exclusively.
 
I always ran 95 in my MY05 when I had it. I'd tried all three fuels, and found that 91 blew out the economy to by 1.5-2l/100km consistently, and dulled throttle response. The car used to ping on 91 which was quite annoying. 95 resolved the pinging, improved fuel consumtpion to around 10.7l/100km every tank (heavy traffic commuting) and gave sharper throttle response whilst 98 made the car use more fuel and for some reason harder to start when cold.

Before anyone says that I'm wrong and that they're right - this was after 10 years of ownership. The XV runs solely on 98, and returns excellent fuel economy - am I wasting my money? I might be - but I don't smoke, and I don't drink much so for me I'm happy with the performance and economy of 98.
 
https://youtu.be/Rb4ZjNioMl8

In that above video, when it is doing the up hill part does that sound like the engine is pinging?

I have been reading this with much interest. Perhaps I should be putting in higher octane fuel as the previous owner had shaved the heads, but I'm not sure by how much.

Also shouldn't my knock sensor have backed off the timing to prevent it anyway (assuming it is pinging)
 
Fazed said:
Also shouldn't my knock sensor have backed off the timing to prevent it anyway (assuming it is pinging)
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Hence why I think, as someone mentioned earlier, some pinging is normal. If it doesn't ping then how does it know to adjust the timing?

It's worth mentioning that carbon build up may be sufficient to increase compression to the point it starts to cause ping more frequently, so maybe throw a can of UEC through the engine.
 
Venom said:
Hence why I think, as someone mentioned earlier, some pinging is normal. If it doesn't ping then how does it know to adjust the timing?

It's worth mentioning that carbon build up may be sufficient to increase compression to the point it starts to cause ping more frequently, so maybe throw a can of UEC through the engine.
Click to expand...

It's near due an oil change so will do the UEC soon. Just noticed that Nulon make a foaming air intake cleaner, which claims to do what the subaru version does at about half the price.
 
Nah, I don't, Peter.

However, it does seem to be a pretty detailed list just for a scam ...

Always worth remembering that the Oxford English Dictionary (OED) was created in much the same way as Wikipedia is today - just somewhat different technology ... :poke: :lol:.
 
RB that's a really interesting analogy between OED & Wikipedia. I wonder if in a hundred years somebody will see this forum & fuel discussion! Can only imagine the changes in cars in the next century :-)

Best regards,
 
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