Tesco & Fuel...

As long as you're not red-lining it everywhere then I don't see the problem with using 95RON at all.

I only very rarely use V-Power in my 200 and I've not had any issues at all, yes I'm aware that it's an older engine and the like but for general cruising around town and work trips, it's fine.

If I was going on a track day or spirited driving around the back roads then I would definitely put the proper stuff in.
 
I dont notice any difference between 95 vs 99 on my 2.0 TFSI but i always use 99 because it's supposedly better for keeping the engine clean. (FSI is direct injection into the cylinder so if it doesnt burn clean the exhaust recirculation will deposit gunk on the intake ports. It doesnt have the injected fuel going through the intake ports to keep it clean like most engines.)
Petrol quality makes no difference to intake port carbon build up ;)
 
Petrol quality makes no difference to intake port carbon build up ;)

I was told that a fuel which doesnt burn cleanly puts out more soot. Some of which gets recirculated through the EGR valve and ends up on the intake side of the engine?
 
I've had 95RON put in N54 (two turbos), N55 (twin-scroll turbo) and highly modified 2zz-ge (supercharged) engines for months, and then months on Shell vPower (Nitro), all I noticed was 1-2MPG more. Nothing else at all.

I'm guessing that was an aftermarket S/C? Reason I'm asking is that my Dad's Corolla Compressor actually goes into limp-home mode if it isn't 99RON!
 
See this mentioned a lot, any evidence though?

Not evidence as such, but I drive an incredibly underpowered car*, and I find that it is even worse when running on cheap fuel. There are noticeable power dips under acceleration and I've even had "kangaroo juice" incidents once or twice with supermarket petrol. The engine is more responsive and there have been no such incidents with better fuel.

Things you may not notice unless you drive a car where you need to use all of the power a-lot of the time.

Tried BP Ulti once as well, I think it was a little better but it was probably just a placebo effect. I'm not going to start putting super in a Polo though. :p

*Car weighs 1.1 tonnes, has just under 54BHP.
 
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Not in the public domain no :(

You'd have thought given the multi billion dollar petroleum industry that the fuel companies would be shouting it from the roof tops if it was true. Rather than dubious marketing strategies.

It'd be very easy to run two engines on a test bed and compare the intake valves of one on premium fuel and one on boggo fuel, yet I've never seen the pics.
 
You'd have thought given the multi billion dollar petroleum industry that the fuel companies would be shouting it from the roof tops if it was true. Rather than dubious marketing strategies.

It'd be very easy to run two engines on a test bed and compare the intake valves of one on premium fuel and one on boggo fuel, yet I've never seen the pics.

You'd have thought so but it's quite a sensitive subject. You cant make claims based on single data points - A company did that with the 1% claim on Fuel saver - the UK ASA soon asked them to remove the claim and it needs to be relevant to each countries car parc. Also a lot of the work is co-funded by OEMs as ultimately they want to understand problems/ issues with hardware.

In any case DI is relatively new in mainstream cars and new fuel technologies take a long time to develop, im sure there will be more on fuel benefits in the future...
 
Anyone with direct injection should use decent fuels. High octane ideally but even avoiding supermarket stuff is worth doing.

Direct injection systems can suffer from deposits significantly affecting performance/ emissions and fuel economy.

I'd argue that if you're driving 30 miles on reserve tank, that argument for using premium fuels is null and void given you've likely already dragged a load of sediment and other crap through the injectors.
 
I'd argue that if you're driving 30 miles on reserve tank, that argument for using premium fuels is null and void given you've likely already dragged a load of sediment and other crap through the injectors.

Tanks empty downwards. Any 'sediment and other crap' would come out first, not last.
 
I'd argue that if you're driving 30 miles on reserve tank, that argument for using premium fuels is null and void given you've likely already dragged a load of sediment and other crap through the injectors.

Show me some sediment or other crap in the bottom of a fuel tank, I challenge you.
 
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