Technical Shell V-Power

[Bolty]

I put half a tank of this stuff into my 1.4 at the weekend, drove about 120 miles, mostly motorway, and achieved little more than 34mpg. I then used the Shell normal stuff, did the same drive and achieved 42mpg, with no change in my driving style. Both times I fuelled up the tank was almost empty. This is a vast difference in fuel economy; I expected the premium stuff to last alot longer since I had paid 141ppl!

Very unimpressed. Anyone know what happened??

 

[dave]

it takes more than 120 miles to see the benefit, you didnt give the ecu enough time to adjust to it

 

[Bolty]

I see, so before you see any benefit you should expect to see a massive drop in fuel economy?

 

[mzhussein]

it works. i have no doubt in that. i ran my stilo for a year, averaging 22mpg. switched to v-power, after a year the average was up to 30mpg. needless to say i stayed using v-power.

there were probably other factors messing with your results. many studies show that it works.

 

[Most Easterly Pandas]

it takes more than 120 miles to see the benefit, you didnt give the ecu enough time to adjust to it

:yeahthat:

Don't faf with half tanks, run it on fumes, so the gauge is right at the very bottom end of reserve, still always plenty left in there, then fill the tank to full and make a note of your ODO reading.

Then join here, and judge after a few full tank fills

 

[gerhardj]

Thanks MEP I have just registered on the site. Why do they not have lit/100km function?

Shell V-Power is sold in South Africa as just another petrol. No fancy price or anything. I have not experienced any gain in consumption between different petrol makes. (Available here is Total, Shell, BP and two local brands called Sasol and Engen) Price per liter is all the same as it gets regulated by the national zoo, sorry I meant government. As we have only one refinery in South Africa, based in Durban, all petrol/feul here start of as the same thing. It is only after the different companies added their respective additives/magical portions that it is sold as Shell V-Power or BP Super etc.

 

[GrandeGuy]

By increasing the octane you are effectively altering the ignition timing,
It's harder to ignite and needs more ignition advance, so by putting it in, your retarding your ignition, you need to disconnect the battery for 48 hours or just let it run it's course and adjust.
Im not sure on the Stilo setup but my Honda i adjusted the ignition timing manually by 3deg,
It burns hotter so helps keep emissions down, great fuel for winter, the heaters and engine warm up way quicker.

 

[AudiTT 83]

i dont run my fiat on vpower but my 3.2 TT i run on vpower only. i found that i get 28mpg from it easily where before i got 26mpg, the throttle response is better and its just a nicer drive. but when you change, you need to change properly and let it run through at least 4 tanks worth before you will really see the difference.

 

[clock34]

i too had REALLY poor results in my 1.8 stilo with v-power. dropped my average mpg down from 44/45 to 29.... it is because it burns slower it doesnt get the instant bang so it injects more to get the same results.... slowely it will learn it doesnt need to / to retard ignition all byitself.... if you have the cash to let it lol. on another note unplugg the battery overnight and when you turn it on it will auto sort it all out to run perfectly on v-power and ive herd nothing but good results on cars with auto ignition retarding.... ie, all modern cars

 

[Chris017]

shell v power diesel is really good stuff. might cost a bit extra but it makes up for it in the end. plus i put millers with it and them two combined makes a big difference, even though i dont need to but i just tried it and i get even better performance by adding it.

 

[Chris017]

Also just like to add, I have been using morrisons diesel with millers added to it and I have been getting between 45 to 50 mpg. and that is not motor-way driving at all.

 

[Most Easterly Pandas]

Also just like to add, I have been using morrisons diesel with millers added to it and I have been getting between 45 to 50 mpg. and that is not motor-way driving at all.

I doubt just how much of the change is due to the miller tbh imo.

 

[TangerineTractor]

I went back to Millers after a couple of months off and my mpg having deterioorated - i'd put it down to the colder weather... not much difference at first, but suddenly after a two or three tankfuls, I'm back up to 53mpg on my homeward commute instead of 49, and averaging 50 for my round trip instead of 47. Thats in conjunction with Shell regular fuelsaver diesel, which I always use.