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87 Octane okay to use?

MLue1

Active member
I wish the fuel here in the UK was that sort of price! Granted the lowest RON available here is 95 but even that at the moment is between £1.23 and £1.40 (A LITRE) NOT gallon!, it costs me as much as £70 GBP ($96 US) to fill up , as for using a lower than recommended RON, I would think it was not a great idea!
We pennie pinching Canadians are right behind you! You're lucky that your lowest octane is 95 nothing to worry about.

I do use 91 but TSI can run on 87 octane, the majority of American and Canadians use the cheapest gas, its human nature to want to pay the least, they don't know any better. When you fill up, just glance over and see what other VW owners put in their cars. VW knows this and takes this into account when they tuned the ECU to support 87 and 91 or greater octane. If you're TUNED you pay the Piper.

I can see both sides, last month when I'm home on Hilton Head, I pay $2.60/gallon, as soon as I get back to Toronto the price jumps to $4.90/gallon (Price based on 3.785 litre US Gallon).

When gas prices start rising again, remember what was said.
 
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brobst

Active member
93 is 3.50 up here. Pain to fill up, but I'm tuned for 93 so that's a different story

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herrerafavian2

New member
Ugh you guys suck! Just filled up for the weekend, Chevron premium only of course. But here in Northern California it's 3.89 a gallon, and even the cheap 87 crap from Arco is 3.39 a gallon.

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MLue1

Active member
Makes a slight difference (4 whp peak, up to 10 lbs/ft at certain RPMs) as tested on a dyno.

https://www.edmunds.com/volkswagen/gti/2010/long-term-road-test/2010-volkswagen-gti-the-effect-of-octane-on-its-power.html

You'll probably lose some mpg though due to decreased ignition timing, as others have mentioned.
Thanks, I knew there was an article I had seen.

BTW If you switch between different octanes drive a few miles to get fresh gas to the injectors, turning off/on two more times resets the fuel trim settings stored in the ECU.
 

Carlosfandang0

Active member
The sticker inside my filler cap states to use 95RON minimum, my engine is a CCZB (UK), would this suggest it has a more powerful (base) tune straight from the factory compared with NAR?


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wudini

New member
It's called cost of ownership. I feel like a jerk saying "if you can't afford 91/93, don't buy a car that requires it", but that's really the case. Not only does VW require 91+, it requires 91+ Top Tier fuel. https://www.toptiergas.com
 

Blakcard

Active member
Yep... just pd $72(USD $56) to fill up with Premium. Thats about 15$ more than this time last yr. $70/barrel is stinging... least im not in BC where i have to decide if Im eating or driving today
 
The sticker inside my filler cap states to use 95RON minimum, my engine is a CCZB (UK), would this suggest it has a more powerful (base) tune straight from the factory compared with NAR?


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The sticker on my GTI's gas door. Looks like the minimum is 91 octane.

 

Carlosfandang0

Active member
The sticker on my GTI's gas door. Looks like the minimum is 91 octane.



I would say that says min 95 RON (research octane number) I don’t know what the (R+M)2 91 means? But I would say it’s suggesting you can use the lower octane as long as you add an additive or octane booster to it ?!??! But that’s only a guess!

Here’s my sticker, it states 95 RON only!



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Carlosfandang0

Active member
Ok so I now see that 95 RON = 90 or 91 in the US using the (R+M)/2 method, i.e. the RON + MON and divide by 2, Which makes sense since according to Wiki RON is 8-10 points higher than the equivalent (US) MON rating (which I believe is 85) That article also shows that 95 RON = 90 or 91 in the US using (R+M)/2. Every day’s a school day!! Or so they say.


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