Unleaded Or Super Unleaded?

As the title says peeps,whats everyone putting in the tank!

Is it really worthwhile putting in Optimum fuels,I have a k1 curvy & was wondering if other people put in the dearer fuel & does it really matter.

[fizzwheel]

The only time I noticed any benefit was during cold damp winter days as I found that the bike was less prone to carb icing on the super unleaded / premium fuels than on standard stuff.

Most of the time IMHO its not worth it, I never found any benefit in terms of MPG or performance.

[Wideboy]

Originally Posted by fizzwheel

The only time I noticed any benefit was during cold damp winter days as I found that the bike was less prone to carb icing on the super unleaded / premium fuels than on standard stuff.

Most of the time IMHO its not worth it, I never found any benefit in terms of MPG or performance.

+1 to all of that

[Jayneflakes]

To be honest, I used to fill my K3 SV with Super after a friend said that modern bike engines are designed for it. However, if there was any difference neither Carol or I could tell.

These days I just fill her up with standard unleaded, the same with my CG125 and that is a high performance engine!

[yorkie_chris]

Originally Posted by Jayneflakes

a friend said that modern bike engines are designed for it.

Tell your friend to STFU.

If engine was designed to run on super it would detonate itself to bits if you ever filled it with regular. Compression ratio of SV is well within limits of 95RON fuel.

makes **** all difference in the pointy slightly easier starting in the curvy thats about it.

Originally Posted by yorkie_chris

Tell your friend to STFU.

If engine was designed to run on super it would detonate itself to bits if you ever filled it with regular. Compression ratio of SV is well within limits of 95RON fuel.

+1. V-power or any other of the higher octane fuels avaliable only make a differance to the cold starting and running (i.e. the first 10 minutes until your bike is up to temp enough not to suffer from carb icing). Else, it makes little differance unless you have something like a GSXR or R1, something with and engine in a higher state of tune, then you may (may!) stand to get a performance benefit.

I put in V-power into a fuel injected bandit i was lumbered with for a while to see if it make any differance. Not a bit, it was still crap fueling

[yorkie_chris]

ASH do some reading. None of the supersport bikes have a knock sensor on them. They're set for 95RON. And amount of extra ignition advance you can give is worth hardly any power anyway. And it's not like they can change compression ratio on the fly. If you want to tune motor THEN start looking what fuel to run, if you want mad compression then go to premium/octane booster/avgas/race fuel/methanol etc. Whatever you want to spend.
Also engine can suffer carb icing if it is at full temp easily. Needle is part that gets chilled not engine itself. Coolant at 100deg is nowhere near, just a few Kg of freezing air and water vapour going past it.

Only reason premium fuel would add power is if it is different density and fuel map is wrong for different density.

[fizzwheel]

Originally Posted by Alpinestarhero

Else, it makes little differance unless you have something like a GSXR or R1, something with and engine in a higher state of tune, then you may (may!) stand to get a performance benefit.

I've put Superunleaded into my GSXR, it made no difference to MPH or performance on that either. OK well not stricly true, I noticed my wallet was a bit lighter.

Originally Posted by fizzwheel

I've put Superunleaded into my GSXR, it made no difference to MPH or performance on that either. OK well not stricly true, I noticed my wallet was a bit lighter.

So power to weight ratio increased...see, it DOES work!

I suppose you might be able to notice some gains on a dynometer. But like I said, its all just a maybe...

Anyway, for what it might be worth, i run sheel V-power through the winter. In the summer, I'll fill up with it if I feel like splashing the cash, but otherwise normal unleaded is best (for my wallet)