i use super unleaded but i have got a turbo and tuned for it

standard car can't see the point in using super i would use normal stuff there is a post on here somewhere about the differences and it doesn't make any to a standard car

 

Is it good to give your engine a bit from time to time?

 

I put a tank of V power in along with BG44K recently to give it a 'clean' I suppose is the best word, as it had been running tired. Noticed a difference but have gone back to standard unleaded after that.

http://www.amazon.co.uk/gp/product/B005GDC46E

 

I put a tank of V power in along with BG44K recently to give it a 'clean' I suppose is the best word, as it had been running tired. Noticed a difference but have gone back to standard unleaded after that.

I have been thinking about trying this for a long time... how does it help the engine ? :yes:

 

Is your MX5 stock?

If so there's no real point, it has additives which are used to clean internals, removing carbon deposits etc which is good. It may make a difference for say a turbo'd 5 as i'm sure turbo'd cars are more likely to pre-detonate. The higher the RON number the less likely the fuel is to detonate before the engine needs it to.
I hear It can be beneficial to newer cars as they have a more sophisticated ECU which adjusts to the type of fuel that you use.

It wouldn't hurt chucking it in now and then but usually I'll stick with Normal shell unleaded or similar.

Good video from fifth gear!

 

it has additives which are used to clean internals, removing carbon deposits etc which is good.

This, basically. No harm in it and at the end of the what's a few quid extra per tank of fuel every now and then?

My POV on it anyway

 

I always run my cars on it (aside from shitters), for the sake of a few quid - V power is 8p a litre more than normal Shell fuel here, over a 40l fill up that's £3.20 - I'd rather put fuel in with the better additives etc.

 

I occasionally run my N/A engine on super unleaded, and I can tell quite a difference

 

Makes zero difference to MK.1 mpg. Claimed cleaning properties might help, hard to tell.

 

If an engine is mapped for super-plus or is self-mapping via knock control like the Mk3 / 3.5 then use it, otherwise there is no benefit.

 

I always ran my MK1 1.8 on super. I had a head gasket failure and decided to buy a second hand head to recondition so I could swap them over in one day. The second hand head came from a car with comparable mileage, but the difference in terms of the state of the exhaust valves was massive. On my original head, there was a thin layer of buildup, whereas on the second hand one it was several mm thick in places. Now whether this was due to fuel, I can't say, and my car already had significant mileage on it before I bought it so I've no idea what it was running previously. But certainly there was a very dramatic difference in the condition between the two which I couldn't really explain.

I chuck a tank in every now and then. It's a few quid more and supposedly keeps the car working at its best. I doubt it'll give more mpg or power, on even the most advanced modern cars. But I view it as a form of preventative maintenance.

 

No point in a stock Mk1or2 car, probably only worth it if you're going to stick a bottle of forte in to give the injectors a clean out.

forced induction needs it to keep det down.

 

Regular shell unleaded in my Mk2 1.8. Have noticed that with the supermarket fuels she tends to run rougher than with the Shell, runs very smooth with the Super plus which I run through it once a month.

 

I always ran my MK1 1.8 on super. I had a head gasket failure and decided to buy a second hand head to recondition so I could swap them over in one day. The second hand head came from a car with comparable mileage, but the difference in terms of the state of the exhaust valves was massive. On my original head, there was a thin layer of buildup, whereas on the second hand one it was several mm thick in places. Now whether this was due to fuel, I can't say, and my car already had significant mileage on it before I bought it so I've no idea what it was running previously. But certainly there was a very dramatic difference in the condition between the two which I couldn't really explain.

I chuck a tank in every now and then. It's a few quid more and supposedly keeps the car working at its best. I doubt it'll give more mpg or power, on even the most advanced modern cars. But I view it as a form of preventative maintenance.

fuel definitely makes a massive difference to the inlet valve deposits on a pfi engine. It sprays directly onto the valves and the additives prevent and remove crap. I'm sure a quick Google of bp ultimate or shell v power will show some dramatic difference

 

I always ran my MK1 1.8 on super. I had a head gasket failure and decided to buy a second hand head to recondition so I could swap them over in one day. The second hand head came from a car with comparable mileage, but the difference in terms of the state of the exhaust valves was massive. On my original head, there was a thin layer of buildup, whereas on the second hand one it was several mm thick in places. Now whether this was due to fuel, I can't say, and my car already had significant mileage on it before I bought it so I've no idea what it was running previously. But certainly there was a very dramatic difference in the condition between the two which I couldn't really explain.

I chuck a tank in every now and then. It's a few quid more and supposedly keeps the car working at its best. I doubt it'll give more mpg or power, on even the most advanced modern cars. But I view it as a form of preventative maintenance.

fuel definitely makes a massive difference to the inlet valve deposits on a pfi engine. It sprays directly onto the valves and the additives prevent and remove crap. I'm sure a quick Google of bp ultimate or shell v power will show some dramatic difference

My bit of googling came up with this to remind us even Shell get it very wrong from time to time, I can remember a time when Police Granada 2.8i`s used to blow-up within seconds of going into pursuit mode, brilliant stuff :thumb-up:

 

Bit off topic but if you map a turbo 5 on standard and then run regularly on super any benefits/issues? I think there has been a recent thread on this but couldn't find it

 

I occasionally run my N/A engine on super unleaded, and I can tell quite a difference

In that case my friend, come over here i have some an 'electric turbocharger' that will give you up to 500 extra bhp!!!!1!

RSC, using super in a fi'd car thats been mapped with 95ron, will have no ill effect...but you'll make less power for a given psi, because you can't have such aggressive timing.

 

RSC, using super in a fi'd car thats been mapped with 95ron, will have no ill effect...but you'll make less power for a given psi, because you can't have such aggressive timing.

Cheers Alex, it'll be remapped in a few months once I get used to it and fit a more suitable 2.5"-3" exhaust system

 

I have used both and i find i get more mpg from supreme unleaded

 

Alex, I speak as I find, it's not in my 'kin head. OP wanted opinions. I gave mine.

 

RSC, using super in a fi'd car thats been mapped with 95ron, will have no ill effect...but you'll make less power for a given psi, because you can't have such aggressive timing.

you'll make less power than you would be able to if you were mapped for 98 but simply switching fuel from 98 to 95 on an engine mapped for 98 will have no impact on power - you've already reduced it with your timing map. In this case, 98 will give you a little safety margin against knock especially if you've mapped close to the limit on 95 and maybe don't have much retard with high iat's etc

 

The 5 gets regular and super. It does run a little smoother on super and it's what I use on Trackdays etc. THismaybe because I run the timing more advanced that standard.

The Civic always uses V-Max Nitro Super Mega Uber Jet Fuel or whatever shell call it this week because it runs like an absolute bag of arse on regular when cold.

 

The reason yours feels smoother on trackdays is because you are wearing a helmet and as a result you can`t hear the mechanical torture quite so well.

 

^lol

 

It's all a load of FUD and Derp...

If you have a normal 5...use normal unleaded, you do not have a wideband o2, you do not have a knock sensor. Any possible improvements are negligable and Roadsterblue, it may be your opinion, but i'm 100% that there will be no actual difference in either maximum power, or fuel consumption.