Tk_mkv1
Go Kart Champion
- Location
- United States of 'Murica!
they probably mixed it up and suppose to put on regular golf, betting one of the golf's will have a 91 or 93 sticker.
I'm just going to fuel the fire and leave this here...
http://www.edmunds.com/volkswagen/g...en-gti-the-effect-of-octane-on-its-power.html
If VW says it's okay, why would it lead to issues? I'm seriously asking as I don't know. Won't the ECU just alter the timing to make sure that no knock is possible? Yes it does lower HP but let's say I'm going on a long road trip with the family and want to maximize cost savings, there should be nothing wrong with that. Not like I'll be consistently redlining the car while on a road trip.
I'm honestly not entirely sure, but why would a lower octane cause more carbon deposits? Aren't carbon deposits based on how clean the the fuel is from the fuel supplier (Shell, BP, aka Top Ten Tier)?... and how well the combustion process occurs? As far as I know, all higher octane does is prevent knock and detonation.
If VW says it's okay, why would it lead to issues? I'm seriously asking as I don't know. Won't the ECU just alter the timing to make sure that no knock is possible? Yes it does lower HP but let's say I'm going on a long road trip with the family and want to maximize cost savings, there should be nothing wrong with that. Not like I'll be consistently redlining the car while on a road trip.
I'm honestly not entirely sure, but why would a lower octane cause more carbon deposits? Aren't carbon deposits based on how clean the the fuel is from the fuel supplier (Shell, BP, aka Top Ten Tier)?... and how well the combustion process occurs? As far as I know, all higher octane does is prevent knock and detonation.
I don't think "cheap" enters in to the equation. People can talk money all day. It's what's in the bank that counts. If someone does a stop and go drive to work everyday, 5 days a week and can save about $20 a week, thatnumber adds up over time.
A loss of about 4 ponies is nearly negligible in my op. On the other hand, if running a lower octane will cause harm to the engine I would like to see factual data showing that with the current GTI.
Opinions are great but, facts are better.
Taken from 2015 VW GTI Manual:
"Using the correct grade of gasoline is very important to help prevent engine damage loss, the recommended gasoline octane rating for your engine is listed on a label inside fuel filler, if unleaded Premium grade gasoline is specified for your vehicle, then Volkswagen recommends using, tOP TIER Detergent Gasoline with a minimum octane rating of 91 AKI (95 RON).
Information on TOP TIER Detergent Gasoline, please go to official Web site, the gasoline grades most commonly sold in the United States and Canada have following octane, ratings, which can usually be found filler pump, unleaded gasoline is available throughout the USA and Canada.
Do not take your vehicle to places where unleaded gasoline may not be available, you may use unleaded gasoline blended with alcohol or MTBE (methyl tertiary butyl ether), commonly, referred to as oxygenated fuels, if the blended mixture meets following criteria, blends of gasoline and methanol (wood alcohol methyl alcohol).
Anti-Knock Index (AKI) must be 87 higher, blend must contain no more than 3% methanol, blend must contain more than 2% co-solvents, blends of gasoline and ethanol (grain alcohol ethyl alcohol).
Blend must contain no more than 15% ethanol, blend must contain no more than 15% MTBE, many fuels are blended especially for winter or summer conditions, volkswagen suggests that you buy fuel at busy stations where the seasonal adjustment more likely.
Starting fluids can explode and cause run-away vehicle condition, never use fuel with an octane rating lower than 87 AKI/91 RON, never use leaded gasoline! Leaded gasoline will severely damage your vehicle's catalytic, methanol-blended fuels that do not meet the criteria listed above may cause corrosion."
https://carmanuals2.com/volkswagen/golf-gti-2015-fuel-35860
Of course if you have Stage tuned your car that is a whole different story.
It's more like 2 dollars per fill up difference. Premium is usually about 20 cents more than regular, and at worst you put 13 gallons in. That's 2.60. Unless you fill up multiple times a week, it's not going to make much difference. When I had my 1.8t GLI I ran 87 through it a few times and always got lower mileage than if I had put premium in it.
It's more like 2 dollars per fill up difference. Premium is usually about 20 cents more than regular, and at worst you put 13 gallons in. That's 2.60. Unless you fill up multiple times a week, it's not going to make much difference. When I had my 1.8t GLI I ran 87 through it a few times and always got lower mileage than if I had put premium in it.
20 cents more?! Regular at my shell station is 1.93, while I pay 2.55 for premium. I WISH it was only 20 cents
$2.55 is pretty cheap these days, I don't get it for that in Utah.