SInce 28/05, with 4 partial fill ups & one complete fill and 1x 165m trip + loads of running around locally, my average mpg is 31.61, all on Nitro+, JS SU/L & Tesco 99,

4500 miles so far within a VRS TSI Manual, mostly city (London) driving, average 27.7mpg. Super Unleaded (red) makes absolutely no difference for my car.

 

 

Edited 20 September, 201411 yr by Orville

8 mile each way trip,4 on busy dual carriageway @ 70 ish 4 days week,odd bit of 70 driving but mostly towns.over 2 weeks average 32-33 mpg. Vrs tsi dsg. On long run 38 with under 4000 miles on.

My mk2 1.8 manual only did 35 - 40

At the last fill, my 9th, I've done just under 2500 and I think it's starting to loosen up now. Long term average has crept over 35mpg (calculated, the maxi dot figure is slightly higher). Got around 40 on a couple of tankfulls (long runs all motorway or a road except for crossing through central London in the middle of the night).  It only gets v-power nitro.

10th fill done, 407 miles, 90% of that motorway and a road,  returned 38.9 mpg. Shell v power nitro as always. Long term average 35.5 calculated.  My maxidot is close but generally optimistic by around 0.5mpg

Tesco's a penny more @The Meadows on the A30 near Camberly than Sainsbury's heading back to the M3 generally, Sainsbury's is a penny less but, its a weaker octane so I'm trying to figure if the 50p per tank extra shows up in the milage.  Basically, any reason to run rocket fuel and I'm on it.

 

 

I quite like additives, they ain't there for nothing, its kinda like a 47 year old postman running on roids & Anit-flams or just a pure healthy diet, medical evidence may suggest one thing but, the way you feel suggests something completely different.

 

Regards

T

Edited 27 September, 201411 yr by mark999

On 10/09 I filled up with Shell Nitro + and did a small journey to/from work that afternoon, but then drove the 156 miles to Blue Anchor in Somerset for a weekend break, over that weekend I clocked up 403 miles before the fuel warning started to appear. Fuel log on my phone states it's returned an average 32.04 during the 3 days down there and there were a considerable number of 1:4 hills as well as some spirited driving on the A39, A361, M5, A358 & some nice cross country B roads.

 

Filled up with Tesco 99 at Minehead and did a scenic trip back home to Surrey via Taunton, Cheddar, Street, Somerton, Wincanton & the A303, M3 & A31. I've had a few days at home with a number of short journeys and this tank has returned a very satisfactory 31.95 mpg. I probably could have got another 405 out of it, but being on stupidly early starts I can't afford to run out of fuel & be late for work, especially being a train driver! 

 

But it's mpg is improving slowly but surely.

95 or 98RON petrol debates...........................

 

Sounds like the old 1.4 16V threads on the MKI Fabia section....................... :no: ................. :peek:

 

Basically most cars are made to run on 95........the manufactures will state that certain engine tunes/versions will run better on 98RON.

 

To recap:- there have over the past decade been various tests done by car magazines including EVO who ran several cars on 95 RON then 98RON over several months with lots of mileage. They also did before & after dyno runs, & boroscope inspections on the engine. All commented that the cars felt "quicker" & more responsive, also that there were % increases in power (depending on which fuel was used as they tested 6 different fuels), but agreed that the additives were way better with less deposits in the engine combustion chamber.

 

On my engine (1.4 16V AUB 100BHP) Skoda stated that it was better for them to run on 98RON, but they could run on 95 with reduced output. However after many years we are seeing lots of engines which have solely lived on 95RON having piston ring problems etc...

 

Plus remember the problems a few years back when all the "cheap supermarket" fuel got contaminated with to much bio...............all those cars who had to have new lambda sensors, fuel systems etc!..............

 

Basically if you value your engine & like "responsive" use 98RON only................

I quite like additives, they ain't there for nothing, its kinda like a 47 year old postman running on roids & Anit-flams or just a pure healthy diet, medical evidence may suggest one thing but, the way you feel suggests something completely different.

 

The vRS manual doesn't recommend them: " We therefore recommend that no fuel additives are used"

Edited 27 September, 201411 yr by vrsalan

I've used additives in the past, despite warnings in the owner's manual/handbook and had no problems whatsoever, in fact when I used Millers in a diesel it actually improved the mpg by between 4 & 6 mpg. Whilst not a lot it was still worth having.

 

Would I try it with the vRS, probably not as I generally use SUL/Nitro +/Ultimate etc, however if all I could get was normal unleaded, then I might consider an additive such as Millers Power EcoMax to boost it up to SUL levels.

Some how my text got missed off when I quoted someone else's post.

I used to work in the additives industry a few years ago, we ran field test vehicles to test our new additive packages and can confirm that the best additives major fuel companies use make a big difference to keeping injectors and inlet valves clean and hence aids smooth running.

The most expensive ingredient is a heat stable detergent, these are very expensive to develop and are used in premium fuels at a clean up dose rather than a keep clean dose.

Personally I would pay the extra for premium fuel rather than using aftermarket additives.

Mark

I rememeber a magazine doing a test many years ago to see what the performance benefits were for runnning the higher octane rated fuels. The comparisonwas for Shell standard 95 and Vpower 97.

They ran 3 cars

Normally aspirated 1.6lt family saloon - can't remember make/model

Golf gti - This was one of the early turbo cars

Subaru Sti

For the family car there was hardly any gain

For the Golf it was about 3hp

For the Subaru it was about 12hp

As has been stated on this thread. It's about how much ignition advance the manufacturer allows as to what gains will be seen and adjusted from the knock sensor. Having said that, piston temps will be significantly reduced with the better fuel..

Steve.