Premium gas in 1.8L TSI?!

[Mk7GolfDisease]

Octane count is definitely not indication of quality. If @Mk7GolfDisease is in BC, this post was a massive eye opener for me. And it seems that there can be some big quality differences among the top-tier brands also. Luckily where I live, PetroCan 94 (which appears to be pretty consistently E10) is everywhere. Unluckily, we have no E85...

No I am from Ontario not BC and sadly i been noticing something is way off with shells 87 regular grade it burns gas like no tomorrow never gives me much range anymore, so i think they are over filling it with water or some next shit. It doesnt used to do that to me before I will have to try esso next and petro because thats ridiculous. Also, on gas door it says both unleaded regular only minimum then it also says minimum 91 which i take is premium option this makes 0 sense how can regular and premium be minimum to use is sticker bullshit? Shouldnt it say minimum Regular grade and max premium grade i dont know my car is whack gas has been garbage in my car as soon as i left gas station one to three bars on gauge dropped less than 5 mins after driving away from gas station so something isnt right here.

 

[Mk7GolfDisease]

Octane count is definitely not indication of quality. If @Mk7GolfDisease is in BC, this post was a massive eye opener for me. And it seems that there can be some big quality differences among the top-tier brands also. Luckily where I live, PetroCan 94 (which appears to be pretty consistently E10) is everywhere. Unluckily, we have no E85...

And whats E10 and E85?

 

[jimlloyd40]

No I am from Ontario not BC and sadly i been noticing something is way off with shells 87 regular grade it burns gas like no tomorrow never gives me much range anymore, so i think they are over filling it with water or some next shit. It doesnt used to do that to me before I will have to try esso next and petro because thats ridiculous. Also, on gas door it says both unleaded regular only minimum then it also says minimum 91 which i take is premium option this makes 0 sense how can regular and premium be minimum to use is sticker bullshit? Shouldnt it say minimum Regular grade and max premium grade i dont know my car is whack gas has been garbage in my car as soon as i left gas station one to three bars on gauge dropped less than 5 mins after driving away from gas station so something isnt right here.

I can promise you that no gas station adds water to their gas. Water is heavier and will sink to the bottom of their fuel tank and you would get straight water out of the pump because the pickup line is near the bottom of the tank.

 

[jimlloyd40]

And whats E10 and E85?

Ethanol content.

 

[Mk7GolfDisease]

I can promise you that no gas station adds water to their gas. Water is heavier and will sink to the bottom of their fuel tank and you would get straight water out of the pump because the pickup line is near the bottom of the tank.

Well whatever the fuck shell recently started adding to regular grade is a shit show where my range got slashed in half...

 

[norsairius]

Edmunds did a test on an MK6 GTI using 87 vs 91 octane a long time ago (about 10 years). I forgot about this, but I actually posted about it over in the GolfMK6 forums at the time: https://www.golfmk6.com/forums/inde...e-vs-91-octane-edmunds-com-comparison.212021/

The article appears to no longer be on Edmunds's website, but someone copied and pasted the article into a post on the second page. Here are the numbers that people will be most curious about though from Edmunds's testing:

	Peak Power (hp)	Peak Torque (lb-ft)
91 octane	207	219
87 octane	203	216

These are peaks though. The gaps could be wider at different points in the power curve. The graph from the article is unfortunately gone.

I think my bigger concern would be how the lower octane fuel performs or affects the engine when it gets hotter out, but maybe it's not a concern at all. Considering that the GTI's fuel filler door and manual say it's okay to run 87 though, you'd likely be fine for regular daily driving.

For what it's worth, I bought my GTI last year around late July when it was getting decently warm and didn't notice any issues (Edit: while running 87 octane initially for the first few tanks). I've been running 91 octane for most of the time I've had it though. I think I may try a few tanks of 87 octane just to see how things go and see if I notice any real differences.

 

[jimlloyd40]

Edmunds did a test on an MK6 GTI using 87 vs 91 octane a long time ago (about 10 years). I forgot about this, but I actually posted about it over in the GolfMK6 forums at the time: https://www.golfmk6.com/forums/inde...e-vs-91-octane-edmunds-com-comparison.212021/

The article appears to no longer be on Edmunds's website, but someone copied and pasted the article into a post on the second page. Here are the numbers that people will be most curious about though from Edmunds's testing:

	Peak Power (hp)	Peak Torque (lb-ft)
91 octane	207	219
87 octane	203	216

These are peaks though. The gaps could be wider at different points in the power curve. The graph from the article is unfortunately gone.

I think my bigger concern would be how the lower octane fuel performs or affects the engine when it gets hotter out, but maybe it's not a concern at all. Considering that the GTI's fuel filler door and manual say it's okay to run 87 though, you'd likely be fine for regular daily driving.

For what it's worth, I bought my GTI last year around late July when it was getting decently warm and didn't notice any issues. I've been running 91 octane for most of the time I've had it though. I think I may try a few tanks of 87 octane just to see how things go and see if I notice any real differences.

A GTI with an aftermarket intercooler and on regular gas when it gets hot out will outperform a GTI without an aftermarket IC on premium fuel.

 

[Mk7GolfDisease]

Edmunds did a test on an MK6 GTI using 87 vs 91 octane a long time ago (about 10 years). I forgot about this, but I actually posted about it over in the GolfMK6 forums at the time: https://www.golfmk6.com/forums/inde...e-vs-91-octane-edmunds-com-comparison.212021/

The article appears to no longer be on Edmunds's website, but someone copied and pasted the article into a post on the second page. Here are the numbers that people will be most curious about though from Edmunds's testing:

	Peak Power (hp)	Peak Torque (lb-ft)
91 octane	207	219
87 octane	203	216

These are peaks though. The gaps could be wider at different points in the power curve. The graph from the article is unfortunately gone.

I think my bigger concern would be how the lower octane fuel performs or affects the engine when it gets hotter out, but maybe it's not a concern at all. Considering that the GTI's fuel filler door and manual say it's okay to run 87 though, you'd likely be fine for regular daily driving.

For what it's worth, I bought my GTI last year around late July when it was getting decently warm and didn't notice any issues (Edit: while running 87 octane initially for the first few tanks). I've been running 91 octane for most of the time I've had it though. I think I may try a few tanks of 87 octane just to see how things go and see if I notice any real differences.

Yeah not much difference so who cares ill stick to 87 im broke af not anytime soon will i ever put premium in my daily car drive.

 

[relive]

The article appears to no longer be on Edmunds's website

Here's the article:
https://www.edmunds.com/volkswagen/...en-gti-the-effect-of-octane-on-its-power.html

Seems to be a consistent ~2% difference throughout the curve. Edmunds's results are in line with AAA's premium fuel study, which found a 2.1% and 2.0% average increase in horsepower and torque, respectively, between premium and regular fuel in a 2016 Audi A3 with the 1.8L EA888 Gen 3:

https://newsroom.aaa.com/wp-content...ium-Fuel-Phase-II-Research-Report-FINAL-2.pdf

All of the available literature points to the same conclusion: premium fuel provides a measurable, but insignificant, increase in power and torque at WOT. There is no evidence that premium fuel has any effect on fuel economy or the long term health of the engine compared to regular.

 

[tigeo]

Here's the article:
https://www.edmunds.com/volkswagen/...en-gti-the-effect-of-octane-on-its-power.html

Seems to be a consistent ~2% difference throughout the curve. Edmunds's results are in line with AAA's premium fuel study, which found a 2.1% and 2.0% average increase in horsepower and torque, respectively, between premium and regular fuel in a 2016 Audi A3 with the 1.8L EA888 Gen 3:

https://newsroom.aaa.com/wp-content...ium-Fuel-Phase-II-Research-Report-FINAL-2.pdf

All of the available literature points to the same conclusion: premium fuel provides a measurable, but insignificant, increase in power and torque at WOT. There is no evidence that premium fuel has any effect on fuel economy or the long term health of the engine compared to regular.

Yep...but good lord folks think it's Jackalope tears...hahahah

 

[Mk7GolfDisease]

Here's the article:
https://www.edmunds.com/volkswagen/...en-gti-the-effect-of-octane-on-its-power.html

Seems to be a consistent ~2% difference throughout the curve. Edmunds's results are in line with AAA's premium fuel study, which found a 2.1% and 2.0% average increase in horsepower and torque, respectively, between premium and regular fuel in a 2016 Audi A3 with the 1.8L EA888 Gen 3:

https://newsroom.aaa.com/wp-content...ium-Fuel-Phase-II-Research-Report-FINAL-2.pdf

All of the available literature points to the same conclusion: premium fuel provides a measurable, but insignificant, increase in power and torque at WOT. There is no evidence that premium fuel has any effect on fuel economy or the long term health of the engine compared to regular.

Yeah sounds good thanks for the detailed info but it said in that study its for an Audi not vw golf just fyi

 

[relive]

Yeah sounds good thanks for the detailed info but it said in that study its for an Audi not vw golf just fyi

What engine do you think you have in your Golf?

 

[Mk7GolfDisease]

Here's the article:
https://www.edmunds.com/volkswagen/...en-gti-the-effect-of-octane-on-its-power.html

Seems to be a consistent ~2% difference throughout the curve. Edmunds's results are in line with AAA's premium fuel study, which found a 2.1% and 2.0% average increase in horsepower and torque, respectively, between premium and regular fuel in a 2016 Audi A3 with the 1.8L EA888 Gen 3:

https://newsroom.aaa.com/wp-content...ium-Fuel-Phase-II-Research-Report-FINAL-2.pdf

All of the available literature points to the same conclusion: premium fuel provides a measurable, but insignificant, increase in power and torque at WOT. There is no evidence that premium fuel has any effect on fuel economy or the long term health of the engine compared to regular.

Yeah sounds good thanks for the detailed info but it said in that study its for an Audi not vw golf

What engine do you think you have in your Golf?

1.8T

 

[relive]

1.8T

And what engine do you think that the Audi in the study that I linked has?

 

[Mk7GolfDisease]

And what engine do you think that the Audi in the study that I linked has?

Yeah i saw 1.8 but i swear audis and vw are not identical in build to why i stated that maybe same engine but built differently...