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General => General => Topic started by: Woodzey80 on 21 April 2015, 12:22:42 pm

Title: Unleaded or super unleaded ?
Post by: Woodzey80 on 21 April 2015, 12:22:42 pm
Basically just wanted get other people opinions onit, much difference in relation to cost ?
Title: Re: Unleaded or super unleaded ?
Post by: bigralphie on 21 April 2015, 01:16:12 pm
I stick a tank full of shells V power in now and then in the belief it might help to keep the fuel system clean
Title: Re: Unleaded or super unleaded ?
Post by: Mick-H on 21 April 2015, 01:20:40 pm
In the Fazer it's hard to tell any difference, in the C90 the bike feels quicker and in the car I get around 3 MPG more and it seems a little smoother.
 
Title: Re: Unleaded or super unleaded ?
Post by: darrsi on 21 April 2015, 01:30:29 pm
PERSONALLY I think the bike runs best on 97 fuel, I occasionally put in 99 which can make it feel nippier but is obviously the most expensive, but I really don't like using standard 95, it just doesn't feel great to me.

 :lurk
Title: Re: Unleaded or super unleaded ?
Post by: HarryHornby on 21 April 2015, 03:07:33 pm
I occasionally stick in some super and the only thing I reckon it does is make the exhaust bubble and gurgle more when I roll off the throttle.


If it's commuting, normal petrol, if I want to act all Billy Big Balls and sound good, super petrol  :) [size=78%] [/size]
Title: Re: Unleaded or super unleaded ?
Post by: sadlonelygit on 21 April 2015, 05:14:37 pm
put a gallon in yesterday of some fuel i had lying around. riding in to work today the bike was noticeably more responsive, then i realised it was the trackbikes 98 ron in the can.
or it could have been the cold, denser air at 630am as well.
Title: Re: Unleaded or super unleaded ?
Post by: Dead Eye on 21 April 2015, 05:17:05 pm
I use Shell's VPower in all my vehicles (99 RON)

All of them will run on standard 95 RON but I can live with paying a little more to help keep the fuel systems clean. The cars get a little better MPG, up to 10% maybe (but I rarely ever see 30 MPG anyway) but this doesn't cover the extra cost of the fuel.
Title: Re: Unleaded or super unleaded ?
Post by: sadlonelygit on 21 April 2015, 06:25:39 pm
The cars get a little better MPG, up to 10% maybe (but I rarely ever see 30 MPG anyway) but this doesn't cover the extra cost of the fuel.

huh, super+ is 7% dearer where i live..................so 10% better mpg would be a bonus, if i'm not mistaken!
Title: Re: Unleaded or super unleaded ?
Post by: Dead Eye on 21 April 2015, 07:40:22 pm
This is true, but I'm not convinced that an economical engine will be able to take advantage as much. I have an MG ZS with a 2.5L V6 - this gets about 2-3 MPG better on its average of 28 - so it can just about justify the fuel cost on mileage but it's still expensive to run :P The RX-8 on the other hand I haven't tracked on normal fuel but it averages more like 17 MPG but I'm not sure if it will take advantage of the higher RON or not being a rotary engine. I guess it's possible but I still don't know as much about them as I do typical piston engines
Title: Re: Unleaded or super unleaded ?
Post by: sadlonelygit on 21 April 2015, 08:50:38 pm
I have an MG ZS with a 2.5L V6 oh dear!!!!have the butterflies started fluttering yet The RX-8 on the other hand I haven't tracked on normal fuel but it averages more like 17 MPG but I'm not sure if it will take advantage of the higher RON or not being a rotary engine. I guess it's possible but I still don't know as much about them as I do typical piston engines
the renesis motor has too many sensors to allow it to get near pre-ignition. my old 13b motor had 290 at the wheels and had to have super+. but once the boost got into double figures, the mpg went into singles :'(
Title: Re: Unleaded or super unleaded ?
Post by: Mick-H on 21 April 2015, 11:09:00 pm
The cars get a little better MPG, up to 10% maybe (but I rarely ever see 30 MPG anyway) but this doesn't cover the extra cost of the fuel.

huh, super+ is 7% dearer where i live..................so 10% better mpg would be a bonus, if i'm not mistaken!

Agreed, I reckon I save £36 a year by running the higher RON petrol and bike/cars defo runs better with it.
Title: Re: Unleaded or super unleaded ?
Post by: Grahamm on 22 April 2015, 01:14:16 am
IMO "super" unleaded is just a con by the fuel companies to get you to pay more for something of questionable value. Any benefits would be minor if they exist at all.
Title: Re: Unleaded or super unleaded ?
Post by: bri h on 22 April 2015, 07:40:33 am
I thought the bikes were set up to run on 95 octane fuel.  :rolleyes.
Title: Re: Unleaded or super unleaded ?
Post by: His Dudeness on 22 April 2015, 09:59:49 am
Regular for me. My mad skills aren't good enough to notice any difference and if I want to clean the fuel system I go for a 10 quid can of carb cleaner.
Title: Re: Unleaded or super unleaded ?
Post by: Dead Eye on 22 April 2015, 10:44:27 am
I have an MG ZS with a 2.5L V6 oh dear!!!!have the butterflies started fluttering yet The RX-8 on the other hand I haven't tracked on normal fuel but it averages more like 17 MPG but I'm not sure if it will take advantage of the higher RON or not being a rotary engine. I guess it's possible but I still don't know as much about them as I do typical piston engines
the renesis motor has too many sensors to allow it to get near pre-ignition. my old 13b motor had 290 at the wheels and had to have super+. but once the boost got into double figures, the mpg went into singles :'(

The butterflies are still working as best I can tell :P Had the VIS motors out on Monday to check them over.

As for the Renesis, you are right, I've been reading some Turbo threads and that the pre-ignition has been mentioned... as the sell is going nowhere, I'm beginning to consider storing it and doing a long term turbo project with it :)


Regular for me. My mad skills aren't good enough to notice any difference and if I want to clean the fuel system I go for a 10 quid can of carb cleaner.

For a weekend / leisure rider this might be a good option if done regularly (part of general service and maintenance) but for larger miles I would have thought using a fuel with cleaning agents would be more consistent with maintaining the fuel system. Granted it's not overly complicated on the likes of the Fazer I suppose...
Title: Re: Unleaded or super unleaded ?
Post by: darrsi on 22 April 2015, 10:58:18 am
I'll also use a bottle of STP Complete Fuel System Cleaner over 2 tanks of petrol, probably once a year, to give the carbs a spruce up.