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Author Topic: Regular gas for 1.8T Jetta.  (Read 3396 times)

Offline JSCC

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Regular gas for 1.8T Jetta.
« on: June 08, 2005, 11:36:12 pm »
I filled up the tank with regular last week to see what would happen.
I filled it up with 91 before come home tonight, it doesn't feel any different to me.
Is it bad to run a 1.8T on regular in the long run?
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Offline barrie1

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Regular gas for 1.8T Jetta.
« Reply #1 on: June 08, 2005, 11:47:26 pm »
What does your owners manuel say? If you were only doing hiway driving between fillups most engines would be fine. Some of the other owners will be along to give you their views shortly I am sure.
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Offline ovr50

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Regular gas for 1.8T Jetta.
« Reply #2 on: June 09, 2005, 12:28:33 am »
Most turbos require 91 but, Barrie's right, check the Manual.
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Offline adnix

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Regular gas for 1.8T Jetta.
« Reply #3 on: June 09, 2005, 10:20:49 am »
I believe that your 1.8T is the same engine inside my 2002 A4. My owner's manual states that regular (87) gas can be used without any harm but that it will result in a slight loss of power.
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Offline safristi

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Regular gas for 1.8T Jetta.
« Reply #4 on: June 09, 2005, 12:25:53 pm »
IS there 50 frikkin' echos in here...every week some  cheap skate asks about puttin' the wrong GAS in his/Her car...READ THE MANUAL..and comply..Capice..if you want to SAVE $200 a year CUT BACK on the CHIPS/Timmies/Viagra/Porn Channel/Underpants/Toilet Paper/Deoderant/FOOD/Baby Formula/Medicine/Funeral Expenses..get the IDEA>>!!!!
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Offline Shnak

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Regular gas for 1.8T Jetta.
« Reply #5 on: June 09, 2005, 12:26:53 pm »
Someone hasn't taken his pills...
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Offline safristi

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Regular gas for 1.8T Jetta.
« Reply #6 on: June 09, 2005, 12:39:49 pm »
As I said I'm saving the $200 fer Sunoco 94 fer Millie..ta HELL wif da LIVER TRANSPLANT...Barkeep annufer TRIPLE..SINGLE MALT!!!!..and give my Bud(Lite loafers) Shnak here a Shirley ON THE TEMPLE!!!!!
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Offline articsteve

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Regular gas for 1.8T Jetta.
« Reply #7 on: June 09, 2005, 01:59:51 pm »
The 1.8T requires 91.  Volkswagen is just being disingenuous in an effort to move them.

When you use low octane gas in that motor the computer will detune the engine, but to receive the imputs to trigger the detuning the motor is suffering.  In addition, the mileage will decrease.  It is of zero gain to cheap out.  That is why it is dicey to buy premium gas cars from used car lots without first talking to the previous owner as to get a feel if they were cheapo owners.

(Message edited by Articsteve on June 09, 2005)
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Offline sirAQUAMAN64

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Regular gas for 1.8T Jetta.
« Reply #8 on: June 09, 2005, 05:28:54 pm »


You can use regular when premium is not available.

HOWEVER, I would NOT use regular in the 1.8T, especially if you drive anything but grandma acceleration and speed.

The car wasn't designed for that in mind - you'll get reduced performance and the possibility of some long-term wear/premature component failure.

(Message edited by sirAQUAMAN64 on June 09, 2005)
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Offline onearmed

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Regular gas for 1.8T Jetta.
« Reply #9 on: June 09, 2005, 05:57:09 pm »
I myself have noticed my 1.8T running much smoother and powerful with sunoco 94.  For some reason esso 91 seems a bit weaker and rougher, and that is premium too.  I believe some guys on vwvortex.com dynoed a 1.8T with regular gas and then with premium.  Regular netted something like 160hp, premium was 185hp (not sure the exact figures).
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Offline JSCC

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Regular gas for 1.8T Jetta.
« Reply #10 on: June 09, 2005, 10:16:17 pm »
A 10 cents/L difference isn't that much.
I'm more concerned about the long term wear on the engine.

If it doesn't hurt the mechanics and only requires a different push of a button at the pump to save money, why wouldn't I do it, Saffy?

Other than that, I will be asked this same question from customers in the future.
Telling them "premium is recommended" would not be sufficient, if I have previous consumers feedback and tested it myself, I would be much more credible.
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Offline HeliDriver

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Regular gas for 1.8T Jetta.
« Reply #11 on: June 09, 2005, 10:20:09 pm »
No offense intended Jscc, but how could anything you might say be more credible than what VW has written in the owner's manual?
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Offline JSCC

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Regular gas for 1.8T Jetta.
« Reply #12 on: June 09, 2005, 10:24:07 pm »
"premium is recommended" is vague.
It doesn't mention the disadvantages if regular was used.
If it said "premium is a must", then I wouldn't be posting this thread.
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Offline Brigitte

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Regular gas for 1.8T Jetta.
« Reply #13 on: June 09, 2005, 10:34:23 pm »
Since when do Germans politely say "recommended"?

No explanation vill be given.  If you must ask, you do not deserve zis car.
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Offline ovr50

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Regular gas for 1.8T Jetta.
« Reply #14 on: June 09, 2005, 10:40:47 pm »
I follow the logic that if it says premium is recommended, I buy premium. Once again, it's not a lot of money over the year.
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Offline JSCC

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Regular gas for 1.8T Jetta.
« Reply #15 on: June 09, 2005, 10:46:51 pm »
"If you must ask, you do not deserve zis car"

Imagine me saying that to a customer.
My goal is to sell them a car not make them run out of the dealership feeling pissed or talked down.
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Offline barrie1

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Regular gas for 1.8T Jetta.
« Reply #16 on: June 09, 2005, 10:53:53 pm »
That was abit of humour on Brigitte's post there Jscc and I am sure not meant as a slag to you.
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Offline HeliDriver

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Regular gas for 1.8T Jetta.
« Reply #17 on: June 09, 2005, 11:05:17 pm »
You're probably on to something there, Jscc. I wouldn't be surprised if it was the marketing guys at VW who are responsible for the "recommended" wording in the manual.

If the engineers had been in charge, the manual would probably read "required", instead.

Don't want to lose any sales to the cheapskates
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Offline JSCC

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Regular gas for 1.8T Jetta.
« Reply #18 on: June 10, 2005, 12:32:10 am »
Well, anyways, it also states:

115HP engines
minimum octane rating of 87 recommended

180HP/174HP/200HP
minimum octane rating of 91 recommended

Notes
.Do not use any fuel with octane ratings lower than 87 AKI or 91 RON otherwise expensive engine damage will occur.
.Do not use leaded gasoline!

Ok, 91 only from now on. I plan to keep my car in good shape.
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Offline sirAQUAMAN64

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Regular gas for 1.8T Jetta.
« Reply #19 on: June 10, 2005, 10:50:22 am »


Haha @ Brig!

I could hear a German saying that now in my head. Ohhh, that's priceless!
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