what is the best gas?

[Squirlz]

Does the Morgan take Premium?

The manual calls for 95/98 Octane Unleaded. No other specification so I imagine that is some British measure.

I looked it up. That's the equivalent of 91/93 US.

 

[Gumbo4x4]

Was this back in the leaded gas days as they were switching over to unleaded?

More recent than that. Modern electronics & variable timing are a huge help.

 

[bcla]

More recent than that. Modern electronics & variable timing are a huge help.

Even back in the day of distributors, it was possible to retard timing. The car I mentioned had a distributor but the system could adjust to phase of the ignition with the rotor. Modern electronic systems do a better job.

 

[tvguy]

I replaced my MDX with a 2010 Camaro SS. It would run on lower octane gas, but anything under 93 or 94 octane and the computer completely changed the settings of the [some "car guy" can insert whatever it is here] that made a fairly dramatic change in performance (not that I needed all 426 HP, but I liked knowing it was there )

Unfortunately a flaw in the software prevented it from changing back and forth as it sensed the different octane levels. Once it switched "down", it would never switch back without pulling a fuse overnight and resetting the system.

Wow, premium is only 91 octane here. My 87 Suburban with a 454 V8 has run perfectly for 28+ years without an engine repair on regular.
The 65 Mustang I just bought with a 289, however, requires premium. But it was built before the law requiring that cars operate safely on regular.

 

[CPanther95]

Wow, premium is only 91 octane here.

Where is that, CA? I remember some people complaining that they couldn't even get fuel that would allow the Camaro to meet its manufacturer's specs.

Every place I've lived never has never considered an octane level below 93 to be "Premium".

 

[bcla]

Where is that, CA? I remember some people complaining that they couldn't even get fuel that would allow the Camaro to meet its manufacturer's specs.

Every place I've lived never has never considered an octane level below 93 to be "Premium".

California has a high demand for higher octane fuel and also a requirement for a unique fuel. By going to 91 it's easier to meet the demand. It would be possible to just make more overall fuel, but then you'd run into issues with a lot of regular that would be stockpiled and near impossible to dispose. Up until about 2001, 92 octane used to be what was considered "premium" in California. On a recent trip to Washington I was seeing they still had 92 octane as "premium".

It's really a numbers game with the relative demand of regular vs premium. If there's lower demand for premium, it's possible to put out higher octane rated fuel and sell it as premium. Heck - 93/94 octane is often referred to as "super premium". Most of the places that sell 93 octane around here it pump blended using 100 octane racing unleaded.

 

[tvguy]

Where is that, CA? I remember some people complaining that they couldn't even get fuel that would allow the Camaro to meet its manufacturer's specs.

Every place I've lived never has never considered an octane level below 93 to be "Premium".

Turn (or scroll down) to page 235. The 6.2 is recommended to use 91 Premium, not 93. But, and I laughed, it says you can use regular87 too.
https://my.chevrolet.com/content/da.../2016/Chevrolet/Camaro/2k16camaro1stPrint.pdf

 

[CPanther95]

Turn (or scroll down) to page 235. The 6.2 is recommended to use 91 Premium, not 93. But, and I laughed, it says you can use regular87 too.
https://my.chevrolet.com/content/da.../2016/Chevrolet/Camaro/2k16camaro1stPrint.pdf

In the 2010, there were many reports of 91 and 92 octane triggering the switch to the lower performance settings. What's asinine is my dealer had no clue that there was an issue with it never switching back up, and they sold all cars with regular gas - so every SS Camaro sold by that dealership had the lower performance for the life of the car unless the owner did the fuse pull.

What really ticked me off is even using exclusively premium gasoline, I would still do the fuse pull every 6 months because it would eventually switch down. That means there are some stations selling regular gas as premium.

 

[bcla]

In the 2010, there were many reports of 91 and 92 octane triggering the switch to the lower performance settings. What's asinine is my dealer had no clue that there was an issue with it never switching back up, and they sold all cars with regular gas - so every SS Camaro sold by that dealership had the lower performance for the life of the car unless the owner did the fuse pull.

What really ticked me off is even using exclusively premium gasoline, I would still do the fuse pull every 6 months because it would eventually switch down. That means there are some stations selling regular gas as premium.

Fuel does degrade over time (with a reduction in octane rating), although having oxygen in the tank will hasten the degradation. However, modern fuel tanks are positively sealed and don't have much air in them. The empty space is taken up by fuel vapor.

Most gas stations have pretty high turnover, so the fuel should be pretty fresh. Costco stations have perhaps the higher turnover in the industry since they sell so much of it.

 

[IndyRnRfan]

Most Midwest stations sell 91 as high octane premium. It's been years since I saw anything higher than 91. We did have 1 station selling 107 but that was at $5.99/ gal back in 02.

CPanther95, not sure of your age but you will soon find out if you don't already, you will know more about your car before the dealership does. Many times, the car manufactures will find out about problems and issues from car/forums. Dealerships are the last to find out.

 

[tvguy]

Most Midwest stations sell 91 as high octane premium. It's been years since I saw anything higher than 91. We did have 1 station selling 107 but that was at $5.99/ gal back in 02.

CPanther95, not sure of your age but you will soon find out if you don't already, you will know more about your car before the dealership does. Many times, the car manufactures will find out about problems and issues from car/forums. Dealerships are the last to find out.

Yes, we have a station that sells 107 "racing fuel", and it is something like $8 a gallon.

 

[IndyRnRfan]

Yes, we have a station that sells 107 "racing fuel", and it is something like $8 a gallon.

Wow. Better have a sweet ride to spend that money. Definitely don't want that in the grocery getter, lol!!!

 

[tvguy]

Fuel does degrade over time (with a reduction in octane rating), although having oxygen in the tank will hasten the degradation. However, modern fuel tanks are positively sealed and don't have much air in them. The empty space is taken up by fuel vapor.

Most gas stations have pretty high turnover, so the fuel should be pretty fresh. Costco stations have perhaps the higher turnover in the industry since they sell so much of it.

If you are in Arizona, California, Nevada, Oregon and Washington, ARCO is a huge volume seller of gas. They are usually the same price as Costo or a few cents less. They are cash or debit only, no credit cards, and sell gas low to get you in, and then make their money on the snacks you buy inside.

 

[Gumbo4x4]

Most Midwest stations sell 91 as high octane premium. It's been years since I saw anything higher than 91. We did have 1 station selling 107 but that was at $5.99/ gal back in 02.

CPanther95, not sure of your age but you will soon find out if you don't already, you will know more about your car before the dealership does. Many times, the car manufactures will find out about problems and issues from car/forums. Dealerships are the last to find out.

We have 93 here in MO - ethanol blend though. Near the major lakes, there are a handful of stations selling ethanol free 93.

We used to have a station with 100 unleaded, but too many morons filled up & whined about the price thinking they were pumping 87 - even after they made that pump prepay only, people didn't pay attention.

I used to buy leaded 108 for my race Jeep for $4/gallon. 87 was $.85 in those days though LOL

 

[tvguy]

We have 93 here in MO - ethanol blend though. Near the major lakes, there are a handful of stations selling ethanol free 93.

We used to have a station with 100 unleaded, but too many morons filled up & whined about the price thinking they were pumping 87 - even after they made that pump prepay only, people didn't pay attention.

I used to buy leaded 108 for my race Jeep for $4/gallon. 87 was $.85 in those days though LOL

Newest car in my fleet is a 2007 Taurus, owners manual says not to use ethanol at all, unless you bought the FlexFuel version.

 

[Squirlz]

Wow. Better have a sweet ride to spend that money. Definitely don't want that in the grocery getter, lol!!!

We have run 100 Octane in our MINI Coopers during track days at Mid Ohio. Driving at 10/10ths nets you 10 MPG in a MINI!

 

[IndyRnRfan]

Newest car in my fleet is a 2007 Taurus, owners manual says not to use ethanol at all, unless you bought the FlexFuel version.

They are referring to e85. You can run any gas with up to 10% ethanol blend which is what is allowed for regular gas.

 

[bcla]

If you are in Arizona, California, Nevada, Oregon and Washington, ARCO is a huge volume seller of gas. They are usually the same price as Costo or a few cents less. They are cash or debit only, no credit cards, and sell gas low to get you in, and then make their money on the snacks you buy inside.

Sure I'm familiar with ARCO. However, around where I live even they don't match Costco prices. Sometimes they do, but more often than not they don't. The spread in value can be anywhere from 0 to 15 cents.

 

[Gumbo4x4]

We have run 100 Octane in our MINI Coopers during track days at Mid Ohio. Driving at 10/10ths nets you 10 MPG in a MINI!

I used to go through a gallon in about 300 feet LOL

 

[IndyRnRfan]

I used to go through a gallon in about 300 feet LOL

You wouldn't happen to have a pic of that fuel efficient beast would you? Me a my buddies use to spend some time at the track.