PDA

View Full Version : What is "premium gas"


Dr. Flyview
06-02-2006, 11:02 AM
Hi,

I need to refill but not quite sure what exactly is considered premium, what octane rating?

Says I gotta put premium unleaded.

Kal
06-02-2006, 11:05 AM
usually 91 or 92 depending on where you go.

Dr. Flyview
06-02-2006, 11:07 AM
usually 91 or 92 depending on where you go.

And every place will have 91 or 92 (or 94) right?

BTW, where would you ever find LEADED gas?

Hasselhoff
06-02-2006, 11:31 AM
And every place will have 91 or 92 (or 94) right?

BTW, where would you ever find LEADED gas?

Not at any pumps in North America!

You can buy a lead supplement for engines that require leaded gas though.

dtthiaga
06-02-2006, 11:36 AM
Leaded gas cannot be bought now.

For cars requiring it, engines built before 1977 I think, may have to use a lead substitute additive with each tank of gas.

Redline Oil has one...

http://www.redlineoil.com/products_fueladditives.asp?productID=64

You shouldn't use it on modern cars. I think it will mess up your cat. converter.

Esso has 87, 89, 91
Sunoco has 87, 91, 94
Petro Canada has 87, 89, 91
GTO Gas Bar has 87, 91, 94 (Same as Sunoco)

I had a few BMW Technicians tell me to use Esso 91 or Shell Gold instead of Sunoco because of the Ethanol content in that gas. It sounds like Ethanol is better for the environment, but perhaps not for the BMW's.

I still use Sunoco 94 in the BMW and Acura.

ScotcH
06-02-2006, 12:04 PM
Not at any pumps in North America!

You can buy a lead supplement for engines that require leaded gas though.

Most race tracks have leaded gas at their pumps, but it's 110 octane (or more) and is about $5/litre :)

Hasselhoff
06-02-2006, 12:30 PM
Most race tracks have leaded gas at their pumps, but it's 110 octane (or more) and is about $5/litre :)

I stand corrected. :)

5 bucks a litre - ouch!!

BMWags
06-02-2006, 12:42 PM
yep.....race tracks and airports

not that you are going to fill your car up at either of these prolly, 89 or 91 octane should be just fine

paul christians
06-02-2006, 02:22 PM
94 all the way...hehehehe..

spooner_dee
06-02-2006, 02:30 PM
should say right on or near your gas cap what gas to put in, mine says a minimum of 89 octane. so if you have a e36 use 89 or higher.

you can use 87 and your car will work, but its not the best for the engine so i hear.

Hasselhoff
06-02-2006, 04:17 PM
you can use 87 and your car will work, but its not the best for the engine so i hear.

It's definately not good for the engine. We all have high compression engines (around 10:1) and you need the higher octane level to prevent pre-ignition of the fuel in the combusiton chamber - otherwise known as 'pinging'. It's when the air/fuel mixture ignites and begins burning due to the heat of compression, ahead of actual timed ignition from the spark plug.

When it happens (mostly when accelerating hard) you'll hear a 'tinkling' sound - kinda like shaking a tin can with a bunch small pebbles in it.

If you continue to let the engine run this way, you can do some major damage to the sparkplugs, pistons, cylinders and valves.

Here's an example pic of a piston damaged by continuous pre-ignition:
http://www.hastingsmfg.com/Service%20Tips/images/p26.gif

And a bit of a write up: http://www.hastingsmfg.com/Service%20Tips/detonation_and_preignition.htm

Justin e36
06-03-2006, 12:02 AM
Sunoco has 87, 91, 94

Sunoco has 87, 89, 91, 94.

With the usual pricing system, the lowest is the posted price, the middle grade is 5 cents more, the highest grade is 10 cents more. With Sunoco Ultra, is 12 cents more than the posted price.

Quack
06-03-2006, 01:01 AM
Sunoco has 87, 89, 91, 94.

With the usual pricing system, the lowest is the posted price, the middle grade is 5 cents more, the highest grade is 10 cents more. With Sunoco Ultra, is 12 cents more than the posted price.


Sunoco 94 is now 14cents more than the posted price, they changed it awhile ago

kerisabe
06-03-2006, 09:33 AM
Sunoco has 87, 89, 91, 94.

With the usual pricing system, the lowest is the posted price, the middle grade is 5 cents more, the highest grade is 10 cents more. With Sunoco Ultra, is 12 cents more than the posted price.

On the Sunoco north of Eglington on HWY10...they also have 92...

330ci05
06-03-2006, 10:59 AM
V-POWER all the way.*th-up*

thinair
06-03-2006, 12:59 PM
North American Shell fuel is probably the worst fuel you can buy. Shell has a great reputation in Europe (even endorsed by Ferrari), but their fuel is much more refined and very low in sulphur.

330ci05
06-03-2006, 01:01 PM
North American Shell fuel is probably the worst fuel you can buy. Shell has a great reputation in Europe (even endorsed by Ferrari), but their fuel is much more refined and very low in sulphur.


why would u say that?


whats the "best" then?

Quack
06-03-2006, 02:04 PM
this topic has been covered so many times, Sunoco is the gas to use, even my friends that work for Shell & Petro-Can tell me the same thing

notjoe
06-04-2006, 03:56 PM
The octane ratings are ****ed and you'll never actually get what it is that it states.

Octane is subject to the temp at which the gas is held at. Now, the gas might be 91,92, or 94 when it leaves the refinery but by the time it gets dropped in to the tanker, has the heat on it, gets sloshed around and then finally dumped in to the tanks of the station it will never be what the rating is.

I talked to a quality control guy who works for petro-can at the refinery and that is what he told me.

Soldo
06-04-2006, 04:09 PM
Sunoco is the best gas to use for your car, if i have to use another gas i use esso then. I learned my lesson using shell fuels, and have been told that for its a common problem. Shell faked up my fuel guage!

Dr. Flyview
06-04-2006, 05:37 PM
Sunoco is the best gas to use for your car, if i have to use another gas i use esso then. I learned my lesson using shell fuels, and have been told that for its a common problem. Shell faked up my fuel guage!

Wow, really? I always use shell....hmmm

330ci05
06-04-2006, 05:39 PM
i also use shell too, i hear the new V-POWER is GOOD now,

Dr. Flyview
06-04-2006, 05:42 PM
i also use shell too, i hear the new V-POWER is GOOD now,

Yes I hope so.

BTW, my new sig is the first posted pic of my new baby! Looks so small against that corrola.

Justin e36
06-04-2006, 06:32 PM
Sunoco 94 is now 14cents more than the posted price, they changed it awhile ago

Boo. *thmbsdwn* I should pay more attention to my wallet. :(

PedroBMW
06-04-2006, 11:42 PM
r u guys putting sonoco 94 in ur stock engines?? thats a waste of cash, not gonna see any performance gain from that,

M3ti Compact
06-05-2006, 12:33 AM
I used to be a Sunoco 94 fan- my car and my scooter at the time all got 94. Until I was about to run out on the scooter and had to fill up with Shell. Almost immediately after putting in Gold, I felt that the engine ran smoother and the exhaust didn't smell as pungent. I tried this again to make sure it wasn't a fluke- also with the car. It wasn't.

I've been a Shell man ever since!

PoliceDog
06-11-2006, 11:40 AM
....5 bucks a litre - ouch!!

Isn't that what we all said when it hit 89 cents a litre? :eek: