Premium Gas? - Page 3

chaospiece · 06-01-2019, 01:40 AM

I'm pretty sure the ecu adjusts to octane from what's coming in and pulls timing as needed as well as tries to keep the power.
BMW once explained how modern cars try to produce close to the advertised power dealing with air density, octane, etc.

Fuel tables have been shown to only be timing algorithms. Algorithms adjust everything according to knock and so on.

You guys seriously think tables are end all of octane?
There's so many factors even within "93" which isn't always exactly 93, or "High octane" .

Fuel is so imperfect within batches and 93 is not required.

Today engines are over engineered, electronics take care of these discrepancies.

JCunningham · 06-01-2019, 01:43 AM

to a point electronics can compensate but it won't compensate for 87.

enzia35 · 06-01-2019, 03:00 AM

Premium gas. Don’t cheap out. Either 91 or 93, whatever is available in your area.

BlaqWhole · 06-01-2019, 05:22 AM

Question 1: Should I use premium gas?
Answer: Yes. The manufacturer recommends it and they know their shit.

Question 2: Should I follow break-in procedure like the manufacturer recommends?
Answer: No. Do a burnout at first startup. The manufacturer don't know shit.

Silverado57 · 06-01-2019, 05:57 AM

Hard to believe this discussion is still going on.

Martinjlm · 06-01-2019, 06:25 AM

Quote:

Originally Posted by BlaqWhole

Question 1: Should I use premium gas?
Answer: Yes. The manufacturer recommends it and they know their shit.

Question 2: Should I follow break-in procedure like the manufacturer recommends?
Answer: No. Do a burnout at first startup. The manufacturer don't know shit.

mdhopt36 · 06-01-2019, 06:40 AM

Yeah, that's a good'un!!!

wjones14 · 06-01-2019, 07:12 AM

Quote:

Originally Posted by JCunningham

the car is tuned for 93 octane. if you dont have 93 you can use 91. the computer has 2 timing tables.

Quote:

Originally Posted by ctrlz

Do you have a reference for this?
This is not my understanding of how it works. Some aftermarket ECM's will allow dual sets of maps, but you have to program "triggers" that tell the ECM when to switch.
A stock ECM will have basically one set of maps tuned for the recommended octane and a bunch of calibration tables that can be used to modify the timing based on various sensor data. The computer is always "trying" to use the standard table, which is why it is good advice not to push it hard when you have no choice but to use 87.
Correct me if I'm wrong.

Yeah, I don't think that's true either. JCunningham, can you provide your source regarding the 2 tables?

I personally use TopTier 93 octane only in mine. It's a weekend and track car for me, driven maybe 3000 miles per year.

According to the owner's manual, however, you can use 87 and it will not hurt the car. Quote from page 25 of the 2018 manual:

"Use premium 93 octane unleaded gasoline in your vehicle. Unleaded gasoline with an octane rating as low as 87 may be used, but it will reduce performance and fuel economy."

wjones14 · 06-01-2019, 07:14 AM

Quote:

Originally Posted by BlaqWhole

Question 1: Should I use premium gas?
Answer: Yes. The manufacturer recommends it and they know their shit.

Question 2: Should I follow break-in procedure like the manufacturer recommends?
Answer: No. Do a burnout at first startup. The manufacturer don't know shit.

Ha ha!

s346k · 06-01-2019, 07:33 AM

i wish my first car coulda been something like one of these.

TheWiseWolf · 06-01-2019, 10:16 AM

What I have learned over many gas threads is that its RECOMMENDED to use Premium but it is not required.

People saying you are ruining your engine and it will blow up are over exaggerating. It does little damage if any. If you are just using it as a commute car and is usually in traffic then reg is fine. If you are using it for racing/track purposes get premium.

chaospiece · 06-01-2019, 12:10 PM

Big part of tunning a car is literally listening for knock.
Knock depends on your fuel.
Literally pushing as hard as you can before you knock, and blow something up, that's tuning.

Or in reverse, use 87 octane and pull back timing and go as easy as you can, and it won't blow up your engine.

These cars are self tuning using fuel mapping algorithms.

Literally says in the manual, you can use 87 and you won't hurt the car.

It's not fair to say, no use only 91 and go on about people not being able to afford or are irresponsible with their cars.
I can afford 91 all the time, cool. Maybe someone can't spend those extra $9 once. Or something else , but it's not ok for people who dont even read their cars manual to exert themselves right to matters.

mdhopt36 · 06-01-2019, 07:26 PM

Seems i recall that, as
"running off at the mouth."

18LTLoveIt · 06-01-2019, 07:35 PM

V6 only car in line up, swell for reg unleaded.

06-01-2019, 01:43 AM	#30
JCunningham Drives: 2017 2SS M6 Join Date: Jun 2013 Location: WNY Posts: 7,070	to a point electronics can compensate but it won't compensate for 87. __________________ real ZL1 wheels and brakes, 285/305 Michelin Pilot Super Sports, Pray ported Intake manifold, Soler Throttle Body, Rotofab intake, EFI Tuning Flex fuel kit, full American Racing Headers Exhaust, 1 7/8" w/ cats H pipe and mufflers. Full 1LE suspension, with BMR adjustable sway bars and links, GM aluminum cradle bushings, Hurst shifter with lighter reverse spring, TWM shifter knob, Tick level 1 transmission. I should have bought a ZL1

06-01-2019, 03:00 AM	#31
enzia35 Drives: '16 Garnet Red 1SS Join Date: Mar 2014 Location: College Station, TX Posts: 3,450	Premium gas. Don’t cheap out. Either 91 or 93, whatever is available in your area. __________________ '16 Camaro 1SS '18 Miata GT Gone: '01 Camaro, '14 Camaro, '90 Miata

06-01-2019, 05:57 AM	#33
Silverado57 Drives: 2017 Camaro SS Join Date: Nov 2018 Location: East Tennessee Posts: 522	Hard to believe this discussion is still going on. __________________ Kevin Luceo Non Uro

06-01-2019, 01:40 AM	#29
chaospiece Drives: 2018 SS, 2016 GT Join Date: Mar 2018 Location: California Posts: 210	I'm pretty sure the ecu adjusts to octane from what's coming in and pulls timing as needed as well as tries to keep the power. BMW once explained how modern cars try to produce close to the advertised power dealing with air density, octane, etc. Fuel tables have been shown to only be timing algorithms. Algorithms adjust everything according to knock and so on. You guys seriously think tables are end all of octane? There's so many factors even within "93" which isn't always exactly 93, or "High octane" . Fuel is so imperfect within batches and 93 is not required. Today engines are over engineered, electronics take care of these discrepancies.

06-01-2019, 05:22 AM	#32
BlaqWhole Account Suspended Drives: 2017 Camaro ZL1 A10 Join Date: May 2012 Location: NJ Posts: 7,692	Question 1: Should I use premium gas? Answer: Yes. The manufacturer recommends it and they know their shit. Question 2: Should I follow break-in procedure like the manufacturer recommends? Answer: No. Do a burnout at first startup. The manufacturer don't know shit.

06-01-2019, 06:40 AM	#35
mdhopt36 Drives: '17- 1ag37 V6 traded, for 1SS 2018! Join Date: Mar 2018 Location: MA Posts: 469	Yeah, that's a good'un!!!

06-01-2019, 07:33 AM	#38
s346k Drives: like an old lady Join Date: Jun 2012 Location: indiana Posts: 2,418	i wish my first car coulda been something like one of these.

06-01-2019, 10:16 AM	#39
TheWiseWolf Drives: Camaro Join Date: Jun 2015 Location: Virginia Posts: 138	What I have learned over many gas threads is that its RECOMMENDED to use Premium but it is not required. People saying you are ruining your engine and it will blow up are over exaggerating. It does little damage if any. If you are just using it as a commute car and is usually in traffic then reg is fine. If you are using it for racing/track purposes get premium.

06-01-2019, 12:10 PM	#40
chaospiece Drives: 2018 SS, 2016 GT Join Date: Mar 2018 Location: California Posts: 210	Big part of tunning a car is literally listening for knock. Knock depends on your fuel. Literally pushing as hard as you can before you knock, and blow something up, that's tuning. Or in reverse, use 87 octane and pull back timing and go as easy as you can, and it won't blow up your engine. These cars are self tuning using fuel mapping algorithms. Literally says in the manual, you can use 87 and you won't hurt the car. It's not fair to say, no use only 91 and go on about people not being able to afford or are irresponsible with their cars. I can afford 91 all the time, cool. Maybe someone can't spend those extra $9 once. Or something else , but it's not ok for people who dont even read their cars manual to exert themselves right to matters.

06-01-2019, 07:26 PM	#41
mdhopt36 Drives: '17- 1ag37 V6 traded, for 1SS 2018! Join Date: Mar 2018 Location: MA Posts: 469	Seems i recall that, as "running off at the mouth."

06-01-2019, 07:35 PM	#42
18LTLoveIt Drives: 2018 Hyper Blue LT RS Join Date: Dec 2016 Location: Phoenix AZ Posts: 1,474 View My Garage	V6 only car in line up, swell for reg unleaded.

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