optimax

[d3ano]

By putting Shell Optimax into the tank, will this have a positive affect on a 600cc carb bike?
At 90p a litre this could be expensive compared to normal unleaded petrol at 81p litre.

thanks

D3

[Steve_T]

Speculating here, but think it depends if there's enough ignition advance to take advantage of the higher octane fuel. Mostly likely I'd say no.

[wolf1]

Your bike is set up to run on standard unleaded at the factory. To put anything else in it is a waste of money.

Before others bore me with the "you can feel the diference" rubbish, your wrong don't bother. Unless the motor has been set up to use higher octane fuel then it's as much use as those lead pellets saddos used to put in their fuel tanks to replace the lead.

[danhay]

In the long run, optimax can help prevent a degradation of performance due to build up of crud.

I'm normally a complete cynic when it comes to most things, but I really do feel a difference when I put Optimax in my Carb'd CBR11. But I'm willing to admit it may be merely a placebo effect!

[d3ano]

I have heard that optimax will help clean out the pistons and jets etc. Is there proof of this or is this just advertisment gunk?

Considering that my bike was new in 1999 and has about 30K on the clock there should be abit of build up in the engine.

So if it does work how long will i have to use optimax for before the crap inside starts to break down?

thanks

d3

[rsvmilly]

I use it in my car, which specifies super unleaded.

But in all of my bikes I've never noticed any difference. My 600 was intended to work on normal unleaded dishwater.

[catso]

rsvmilly said:

I use it in my car, which specifies super unleaded.

Me too, in the car (as it specifies it) and usually in the bike, but I honestly can not notice any difference even though the bike was last 'set up' with it, if there is a minimal difference it is not noticeable, at least under normal conditions, so is it worth the extra

And why is BP ultimate more expensive than Optimax as I believe it is a lower octane?


>> Edited by catso on Friday 12th November 18:54

[veetwin]

rsvmilly said:

I use it in my car, which specifies super unleaded. But in all of my bikes I've never noticed any difference. My 600 was intended to work on normal unleaded dishwater.

Cars are fitted with knock sensors that detect pinking or detonation and advance/retard the timing to suit. I do not believe that modern bikes are fitted with this and therefore changes in performance based on different RON fuels are unlikely to be detected. The remaining benefits being that of engine cleaning properties.

[dannylt]

Not all cars have knock sensors. Agree you'll only get extra power if the engine is set up with the further ignition advance - but in this case you absolutely should not put normal unleaded in.

However, the other benefit you can get with Optimax is better knock resistance when doing sudden wide open throttle at low revs, so better rideability. But then this isn't exactly great riding skills anyway

[veetwin]

My mistake...

Most modern fuel injected cars are fitted with knock sensors.