To answer your first question.. yes I did a search before posting. So as the title says..
does it really matter?

You drive a tig with a 2.0t? If yes the premium....detonation leads to cracked cylinders...and a big bill.

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You drive a tig with a 2.0t? If yes the premium....detonation leads to cracked cylinders...and a big bill.

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Yup... that would be the one! Thanks for the reply!

If you care at all about your Tig, you'll put nothing less than 91 in in...

I just got my new 2011 SE Tig three weeks ago and I will use nothing but recommended high octane per my user manual. I have read prior threads on this issue here and as a result I want to maintain the optium performance of my Tig. What a feeling when that Turbo takes over on the engine. I can not bear the thought of reducing the performanbce with a lesser grade octane.I highly recommend you USE THE BEST ALWAYS!

So here's a question... the manual calls for 91 octane... A lot of the premium gas offered around here (NJ) is 93 octane. I have been putting the 93 in. Is that okay? I was worried about going over the 91, but the next step down is often 89 octane...

I use premium because I am trying t put the best in my beloved whip... but I find it very hard to believe that using regular (which the manual states is ok) would cause something like cracked cylinders. If that was possible, why would VW say you can use regular?

I think the last thing I read was that you could run lower octane but it would result in decreased performance.

So here's a question... the manual calls for 91 octane... A lot of the premium gas offered around here (NJ) is 93 octane. I have been putting the 93 in. Is that okay? I was worried about going over the 91, but the next step down is often 89 octane...

I use premium because I am trying t put the best in my beloved whip... but I find it very hard to believe that using regular (which the manual states is ok) would cause something like cracked cylinders. If that was possible, why would VW say you can use regular?


Look on the inside of your fuel door....91 prem required...


And yes in a boosted engine low octane can result in serious knock and crack a cylinder...this isn't something I've made up.

I think the last thing I read was that you could run lower octane but it would result in decreased performance.

This is accurate. At least for the FSI. You can run 87, it will switch to a different timing map, and you'll lose HP and fuel economy. Your fuel economy loss will exceed the cost difference in putting 93 in it. Let's say you put 10 gallons in. That's an extra $2.00. That's a half a gallon of gas, so if you get an extra 13 miles, you've made up the cost difference.

Ok, so it is okay to use 93 octane? I've been worried using something higher than 91 would cause problems too.

Ok, so it is okay to use 93 octane? I've been worried using something higher than 91 would cause problems too.

It's fine, 91 or higher, just not lower.