Shell V-Power fuel in Ireland?

Andy From Sligo

Hi, an awful lot of people swear by shell power v fuel or super unleaded to 'clean' the inside of their engines on a regular basis, is every time you fill up. I believe they have some detergent and in the fuel?

But where, or are their many garages in ROI doing super unleaded or shell v power? - I think the octane is 98 or 99 RON .

If not , would putting redex one shot petrol treatment in every fill have the same effect?

zilog_jones

Shell have been gone from here for a long time, and their V-Power here was only 95 RON. All petrol sold in Ireland is 95 RON minimum, none specifically claim higher octanes.

Redex is a cleaning additive, it's not going to increase octane. There are specific "octane booster" additives, honestly I don't know effective they really are. I've never had a car that would benefit from higher octane (like most non-performance engines).

Andy From Sligo

zilog_jones wrote: »

Shell have been gone from here for a long time, and their V-Power here was only 95 RON. All petrol sold in Ireland is 95 RON minimum, none specifically claim higher octanes.

Redex is a cleaning additive, it's not going to increase octane. There are specific "octane booster" additives, honestly I don't know effective they really are. I've never had a car that would benefit from higher octane (like most non-performance engines).

ah right thanks for the reply. Just my engine is ticking over a little bit lumpy , nothing too serious - just some said in the UK that they had the same problem and when they started using shell V- power after a while it was much smoother

colm_mcm

Car is designed to run on regular petrol, so you have a fault.

Could be spark plugs, leads etc which fancy petrol won’t fix.

Andy From Sligo

colm_mcm wrote: »

Car is designed to run on regular petrol, so you have a fault.

Could be spark plugs, leads etc which fancy petrol won’t fix.

I'm gonna spray up the idle control valve in the TB this weekend , see if that make it idle a little smoother, might even take off the whole TB and give it a good clean - had plugs out and they are OK and the leads look good - its a 2016 car

it was only for someone saying they had same car and it run better and idled better after changing to Shell V-Power...

colm_mcm

What car is it?

Are you driving a Sandero or a Clio or something?

Andy From Sligo

colm_mcm wrote: »

What car is it?

Are you driving a Sandero or a Clio or something?

Clio IV now ...

MetzgerMeister

Octane booster is a bit of a con. There are 10 points in an octane rating i.e. to get from 95 RON to 98 RON would mean an increase of 30 RON points. 1 bottle of octane booster does increase octane but by only 1 RON point meaning you would need 30 bottles of it to get from 95 RON to 98 RON.

Andy From Sligo

MetzgerMeister wrote: »

Octane booster is a bit of a con. There are 10 points in an octane rating i.e. to get from 95 RON to 98 RON would mean an increase of 30 RON points. 1 bottle of octane booster does increase octane but by only 1 RON point meaning you would need 30 bottles of it to get from 95 RON to 98 RON.

ah right thanks. Would those 'one-shot' Redex bottles be classed as detergent/cleaners or octane boosters ?

Andy From Sligo

what about all these performance cars in Ireland like Mercedes and BMW and the like , would they not benefit from using super unleaded or 98 RON or V-Power or equivalent?

Thats also why I am surprised that all the garages just sell 95 RON at the pumps.

There was something Maxol done years ago with additives in it I'm pretty sure I heard the adverts for it , or maybe not

bazz26

There is not enough demand for it here and then you have the cost associated with selling it. It would require its own filling pump and another dedicated underground storage tank at a filling station, all for maybe an occasional car to buy it. It would also cost more per litre than 95 RON and people would complain about that too. It just wouldn't make the filling station owner any money.

Leonard Hofstadter

Most German cars are set to run on 98 RON, so they will run better with it. My car is meant to use 98 and when using Super Unleaded it sounds a bit sweeter and runs a bit smoother. While it's noticeable, it is a small difference really. It won't make a lumpy running car suddenly not lumpy that's for sure. As mentioned, it would be too expensive and too many people wouldn't bother so it's not going to happen. If a car is running rough on 95 RON then there is a fault with the engine, even if it was designed for 98 RON, its still fitted with a knock sensor so it should still be nearly as smooth on 95 as 98.

I suspect your Clio is designed to run on 95 RON, if that's the case, you'd get no benefit whatsoever from higher RON fuel even if was available here.

Andy From Sligo

Leonard Hofstadter wrote: »

Most German cars are set to run on 98 RON, so they will run better with it. My car is meant to use 98 and when using Super Unleaded it sounds a bit sweeter and runs a bit smoother. While it's noticeable, it is a small difference really. It won't make a lumpy running car suddenly not lumpy that's for sure. As mentioned, it would be too expensive and too many people wouldn't bother so it's not going to happen. If a car is running rough on 95 RON then there is a fault with the engine, even if it was designed for 98 RON, its still fitted with a knock sensor so it should still be nearly as smooth on 95 as 98.

I suspect your Clio is designed to run on 95 RON, if that's the case, you'd get no benefit whatsoever from higher RON fuel even if was available here.

Thanks for your reply - oh its not really lumpy at all .. more vibrating i would say . I had an old Clio2 with the same D4f 16v engine and that was really lumpy idling , on that though it turned out to be a leak in plug lead number 4 . the spark was jumping in the tube . on these engines the spark plug leads go right into a well .

No, it was just a guy who had same engine and found after a while of filling up with shell v power it was idling much better , I was just guessing maybe the detergent in that shell petrol might have cleaned out the TB and ICV and injectors.

another guy just replaced his top engine mount and things were smoother - might try doing that . - idles very low this engine around 650rpm when i plugged me OBD2 socket and fired up Torque , but thats about right for this engine apparently . if I just press slightly on the accelerator and get it up to around 850rpm its grand

colm_mcm

650 seems too low tbh.

Andy From Sligo

colm_mcm wrote: »

650 seems too low tbh.

I thought that too - very low, but then i went on wiki and found this:

"D4F-740 variant received changes to camshaft and valve lifters to allow lower idle at 650 rpm and shorter 1st and 2nd gear to help with extra weight of new Clio III introduced in 2005"

I have changed a few parameters using a piece of software called DDT4ALL and my OBD2 adaptor (only like adding a few things not implemented by clio like adding time and temp to dashboard cluster , and disabling hill start and enabling a few other things that renault have disabled) and was kinda hoping in the engine ECU settings that maybe i could programme idle rev speed because i would have tried adjusting it up a bid until it gets past vibrating when idling, but it dont look like I can with that software - well not that i can see.

There are some settings in DDT4ALL for adjusting timing on the engine ECU but I dont fancy touching that just in case I muck that up, in any case I think the timing is OK , I just think its very low idling speed , but its right apparently