Honda ST1100 Section > Fuel & Fuel Additives ST1100

Does Premium fuel have all the additives?

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rendog:
I fill both bikes up with BP Ultimate where possible.
Last pay I was sucked in by Wollies to use a discount docket.
Bike idles like shit when cold now - not that it gets real cold up here - but you know what I mean.
Think you need fuel additives, pull out a spark plug & look at the top of the piston.
Black is NOT good, so I added some REPCO branded fuel system cleaner to the tank.

Over the years I've used fuel system cleaner a lot, mainly on diesels.
Generally we scour the system by mixing the additive 50/50 via a tap plumbed into the injection system.
The engine needs to be at operating temperature to do this, they run really rough (obviously) and smoke like a space shuttle taking off.  :eek
Often saves replacing rings and liners or de-glazing bores and always notice less black soot from the diesel's exhaust stack.

PS. Don't try this with your catalytic converters connected, it will ruin them.

rocketeer:
Reblog if you play with diesels- if you ever look at buying some oil I'll throw in some fuel system conditioner- think you'll be a little a surprised....

saaz:
The oil refiners have swap arrangements for their basic fuels (this was an issue that caused problems when I was working on excise arrangements when the GST came in - don't blame me totally though!), so if you have a refinery in your state most fuel likely comes from it regardless of how it is branded when sold. They do add their own additive packages, so the fuels can be different.  This information came from guys on a car forum that drive the tankers.  The discount chains might get their fuel from anywhere that is cheap at the time, including imported product.  Also storage is important as the tanks need to be kept clean and water content controlled.  So while a fuel might start out fine how it ends up being delivered at the pump matters a fair bit.

The premium 98 fuels may be kept by the refiners themselves and shipped around.

My bike used to run rich midrange when tested on a dyno, but I have put in new needles and needle jets, as well as a size down in pilots.  In cruising economy is not much different, but when using the throttle a bit economy is way up.  With all the variables when riding all I can say is that using any of the grades of fuel in my ST11 give about the same distance per tank.  95 and 98 fuels make the bike more cold blooded when starting, but once going feels ok.  The ST13 being EFI learns various setting from using one fuel, so may take a while to relearn on one that is a bit different. I know that is why Dynojet cannot get a power commander to work with an ST13 as the OEM computer undoes what the PC tries to do, so it is a long term loosing game.

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