hi,

looking around on the net and just thought i would clarify.

the vrs tfsi engine is a turbo? as in like a turbo which is in subaru's etc?

so does it come with a dump valve etc? not sure if every car does or not, just like my cars but dont know much about the workings.

cheers

Yeh its a turbo engine, and it has a dump valve, but on more modern cars its a recirculating dump valve so you don't hear the *whoosh* sound you hear on a lot of older cars. The recirculating valves are a lot more efficient and keep the turbo spooled longer than the old fashioned dump valve that just releases the excess pressure...hope this helps.

thanks yeah just wondering. never owned a turbo car, is it much diffrent up keep from any other car?

should it be run on 98ron?

thanks again

thanks yeah just wondering. never owned a turbo car, is it much diffrent up keep from any other car?

should it be run on 98ron?

thanks again

Just keep up to spec on the oil changes, use good quality oil and don't spank it until warmed up, 98 ron will get you a llittle more poke and better mpg

The cars come setup to run on 98, though the timing will adjust to 95. You should get a slight power gain and increased response from higher octane fuel though.

As with any car you should let the oil get up to temp before opening the throttle, particularaly with a turbo and it's also best to let the turbo wind down if you have been thrashing it before switching the engine off as otherwise this can lead to damage to the turbo. If you've been driving it hard and your last mile home is regular driving this should be sufficient though.

Power is also very linear on a modern petrol turbo, no massive turbo lag and then a massive surge of power when it is on boost. Makes it better and more responsive to drive day to day.

thanks for the repsonses as usual.

thanks yeah just wondering. never owned a turbo car, is it much diffrent up keep from any other car?

should it be run on 98ron?

thanks again

As said above, let the car warm up and also let it cool down, last thing u wanna do is give it some beans and then switch it straight off, youll scorch the turbo/manifold and just generally cause yourself problems, if you cant trust yourself to do that invest in a turbo timer, also as above, good quality oil, plenty of services, sooner rather than later etc.

thanks yeah just wondering. never owned a turbo car, is it much diffrent up keep from any other car?

should it be run on 98ron?

thanks again

Just like any other car.

All new diesels are turbos and increasingly petrols (the latest 1.2, 1.4 and 1.8 Octavias are all turbocharged too, only the base 1.4 is not)

The manual does say:

"Caution

you should not switch the engine off right away at the end of your journey after the

engine has been operated for a lengthy period at high loads but should be allowed it

to run at idling speed for about 2 minutes. This prevents any accumulation of heat

when the engine is switched off."

but this is not specific advice to turbo models and in most cases the last bit of a journey in a 30 zone suffices.

According to the brochure, the manual and the filler cap on my TSI it runs on 95RON. This is of course the TSI engine, not the older TFSI.

The manual also says:

"You can make unlimited use of unleaded petrol which has a higher octane number than the one prescribed. On vehicles with prescribed unleaded petrol min. 95 RON, the use of petrol with a higher octane number than 95 does not result in a power increase or a lower fuel consumption"

but nobody seems to believe that on this site!.

Edited 6 April, 201115 yr by juan27

Just like any other car.

All new diesels are turbos and increasingly petrols (the latest 1.2, 1.4 and 1.8 Octavias are all turbocharged too, only the base 1.4 is not)

The manual does say:

"Caution

you should not switch the engine off right away at the end of your journey after the

engine has been operated for a lengthy period at high loads but should be allowed it

to run at idling speed for about 2 minutes. This prevents any accumulation of heat

when the engine is switched off."

but this is not specific advice to turbo models and in most cases the last bit of a journey in a 30 zone suffices.

According to the brochure, the manual and the filler cap on my TSI it runs on 95RON. This is of course the TSI engine, not the older TFSI.

The manual also says:

"You can make unlimited use of unleaded petrol which has a higher octane number than the one prescribed. On vehicles with prescribed unleaded petrol min. 95 RON, the use of petrol with a higher octane number than 95 does not result in a power increase or a lower fuel consumption"

[but nobody seems to believe that on this site!.

Nah, the general consensus is that the TFSI does benefit from 98, which I believe (the difference is fairly noticeable), but the new tsi doesn't, it manages to get full power from 95ron.

I have put normal unleaded in for the last 2 tankfulls & if im honest ive noticed no difference at all from running on super unleaded. I could notice a difference on my mk1 octy vrs but this mk2 feels just as quick & same mpg(if not slightly better) etc on normal.

thanks guys i imagine it is the new tsi as it is 2011 on order so 95 ron should be fine then i guess.

thanks again

I have put normal unleaded in for the last 2 tankfulls & if im honest ive noticed no difference at all from running on super unleaded. I could notice a difference on my mk1 octy vrs but this mk2 feels just as quick & same mpg(if not slightly better) etc on normal.

Interesting, are you running big power too?

I can definitely feel a greater sense of urgency with decent petrol.

Interesting, are you running big power too?

I can definitely feel a greater sense of urgency with decent petrol.

But according to your profile you've got a 2006 Octy which WILL give a difference.

Under the fuel cap on the TFSI engine it says 98 RON (95).

However the TSI shouldn't show any difference in performance on 95, 98, 99 or 100.

But according to your profile you've got a 2006 Octy which WILL give a difference.

Under the fuel cap on the TFSI engine it says 98 RON (95).

However the TSI shouldn't show any difference in performance on 95, 98, 99 or 100.

Yes, that's exactly the point I'm making.

Nah, the general consensus is that the TFSI does benefit from 98, which I believe (the difference is fairly noticeable), but the new tsi doesn't, it manages to get full power from 95ron.

How about "TSI vRS likes Tesco Momentum99 fuel" posted recently? You are correct that the TFSI "needs" 98 but I think there are plenty of recent TSI posters claiming improved performance/economy from the higher octane.

Interesting, are you running big power too?

I can definitely feel a greater sense of urgency with decent petrol.

No,mines standard,i was expecting a difference when i filled up but it appears to be no different.

But according to your profile you've got a 2006 Octy which WILL give a difference.

Under the fuel cap on the TFSI engine it says 98 RON (95).

However the TSI shouldn't show any difference in performance on 95, 98, 99 or 100.

Interestingly, the latest manual states that the TSI should be run on 98, and says you will get lower performance running on 95. No idea whether that's actually true or not, but Skoda are now saying it should be 98!

Worth noting you won't see and feel an instant increase in performance or MPG by switching to higher octane - the ECU will take a little while to adjust to it so anyone who is giving high octane fuel a try needs to preserver. Also worth noting that even if the TSI is designed to run on 95, 98 or 99 will give an increased performance and slight mpg gain as the fuel is far more efficient to burn. For argument sake if you are getting 200 bhp from 95 octane you could well get 210 from higher octane fuel. However as mentioned it will not be instant

TBH with the way petrol prices are atm I think you'd have to be mad to put high octane in to anything other than a proper performance car

I wouldn't use anything other than v-power

I would suggest that if the handbook says the use of higher octain fuel will make no difference then this will be the case as the ecu will not be adapting timing to take advantage of the better anti-knock properties of higher octain fuel.

My perevious Focus ST stated in the book that it WOULD provide a highter power output (to the maximum legal amout of 5% increse (about 12hp in the case of the ST)) using higher octain fuel as the ecu DID adapt timing. And it was quite obvious the change between 95 & 98 when driving.

Hope that helps someone.

IMHO TFSI likes 97+RON. I get a bit more mpg (enough to offset the price) and the engine feels much smoother and throttle response much sharper to me.

Saying that I find that Shell 95RON is as good as supermarket 97+. Supermarket 95RON makes the car feel like you're carrying a body in the boot.

I have read that using 95RON can be detrimental to the engine but I think that is a dubious claim considering how many people here are happy on standard fuels.

Interestingly, the latest manual states that the TSI should be run on 98, and says you will get lower performance running on 95. No idea whether that's actually true or not, but Skoda are now saying it should be 98!

The latest technical supplement (11-2010) to the manual does appear to say this but its for ALL Octys which seems bizarre. Its all as clear as mud.

http://www.skoda-auto.cz/com/service/documentation/octavia/pages/11-2010.aspx

I'd certainly be miffed if I'd bought a 1.2 and then realised it needed 98. Its not cheap stuff.

Edited 7 April, 201115 yr by juan27