Any fuel preservatives or additives?

[martyn107]

So during a bit of mind/body displacement whilst on the rower at the gym I pondered:

Do any of you lot use any additives in your fuel such as Redex? Or just use premium fuel, or think fuck it and just go with Tesco's regular?

[Islander]

Nope. I use any old fuel with no additives whatsoever. Bikes have never missed a beat. Redex and the like are a waste of money.

[RhynoCZ]

I used some STP product in GPz550, worked like charm, I'm gonna try it in the ZXR before I take the carbs out.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[hmmmnz]

nope nothing, cheapest stuff i can find, to match the cheapest oil thats in the bike, only concession my bike gets is diesel oil, but thats only ok if you have a dry clutch
supposedly you can get better mpg from higher octane fuel, but really you'd have to have a f.i. bike to compensate for it, since i dont, i dont bother,
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[Copycat73]

Redex. upper cylinder lubricant.
buy petrol 95ron. from whoever or whenever cheapest.. Asda, sainsburys, tescos etc.
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[simonjb]

I use Shell Nitro+ or BP Ultimate usually, as they have some engine friendly additives. Main difference is it runs a little more smoothly, and extracts another 5-10 MPG out of my F.I. YBR. As MPG is so high, the price difference is not a problem.

It does also FEEL slightly more powerful (even though it's still only a 125), but I won't trust that as it could just be placebo.
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Current Bike: 2008 Yamaha YBR 125

[Wafer_Thin_Ham]

[Wafer_Thin_Ham]

[P.]

I have never used any additive. Petrol is expensive enough as it is.

The bikes will happily run on the cheapest stale petrol as long as it still goes boom boom when exposed to spark spark.

I've ran my old pit bike ongine on 6 month old green looking fuel with some diesel and 2 stroke in there... likely to be brake fluid also.

[simonjb]

[Wafer_Thin_Ham]

[Kickstart]

Hi

Some bike do require 95 RON min, but quite a lot of Japanese bikes only require 91 RON.

Never noticed any difference in performance using higher octane fuels on any of the bikes, nor on most of the cars (the exception being the Maserati which has noticeably more power on higher octane fuel, but then it does have a knock sensor and a couple of turbos). Never bothered to use any additives, although one to prevent the fuel gumming up jets might be tempting on rarely used bikes.

All the best

Keith
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[P.]

I seem to remember the GSXR1000 K6 had a sticker on the tank that says use a minimum of 95 RON.

[Wafer_Thin_Ham]

[Tungtvann]

Even the cheapest shite fuel in the UK is still above a lot of the world's standard. Can't remember the last time I saw below 95 RON in the UK, which is higher than a lot of places outside the EU.

[Copycat73]

[Copycat73]

[Islander]

[stevo as b4]

I've used pour in injector cleaner on various old EFI car's, and also changed the fuel filter first. I'd like to believe that injector cleaner works, but have no evidence of this.

I think with additives it depends on what you want them to do really, as no additive will magically do everything from giving more mpg, more bhp, less engine wear, free up sticky valves etc.

I've used pour in octane booster on 2stroke engines, when I have increased the compression ratio, but 98-99RON fuel would be just as good. However if your after high octane fuel I've been told that adding a decent octane booster to 98RON UL, can achieve 102-103RON fuel, which is useful for race engines, very high compression engines, and Japanese import cars that were tuned for more power and designed for 100RON home market fuel.

In my Rover I use 97-98RON SUL, as it does have a knock sensor, and my engine is tuned running higher boost and a bigger turbo than std, so it might be closer to det at high boost, seeing as I run a std factory ECU with no additional fueling.

If I wanted to clean an engines combustion chamber's, and try to clean carboned up valves and rings, I would just spray water into the engine whilst running, as I think water cleans things as well as any chemical can!

[Kickstart]

[Copycat73]

[mentalboy]

They put enough shit into fuel without having to spend more money countering it.
Slightly off topic but the ethanol they now add is playing havoc with the rubber hoses on my fuel system. I've just had to get a length of something ethanol resistant to replace them, I'd expect cracked hoses in a twenty year old bike but they've turned into a slimy mess. Not happy
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[Copycat73]

[martyn107]

Heard about the ethanol content going up a couple of months ago and how it might cause issues with older hoses. Might stick some Red in to a tank full once I've finished servicing it just on the off chance.

[bladerunner]

I had a srad750 that had been left with the old fuel in the tank and not run for 3 years...felt like it hit the rev limiter at 9k and wouldn't improve with new fuel or 100miles use. Tried some injector cleaner but expected to have to strip and clean them tbh.....within 5 miles it had cleared and pulled like a good dead should! I was very impressed because tbh I didn't rate these wonder treatments! Also I've known post little 4t 125's gain 5 mph and feel a lot better with v power etc yet my 929 feels slower and less keen to rev...no difference in actual indicated top end tho.try it in your bike and see what you think.
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Current bikes...cbr929, KDX200's, Rd125lc mk2, RGV250's