[Oddball]

Ford says the minimum is 87 octane but 91 is recommended in hot weather or towing.

Our Accord hybrid netted 47-48mpg on regular, midgrade netted 49-51 mpg.

The added mpg from midgrade did not overcome the added cost of midgrade.

We run midgrade, less pinging in hot weather.

 

[Aufgeblassen]

We run midgrade, less pinging in hot weather.

Actually, light pinging is just fine and actually ideal; it means engine is running at maximum efficiency.

We had an '81 Ford Fairmont 2.3L 4-speed from new to 60K miles that had a super lean burning carburetor called a "feedback carburetor" or something like that, that pinged some even at steady speed! With even light acceleration, it was very noisy, and at higher acceleration levels, that much worse.

It was geared poorly, and starting out in 1st gear felt like you had 5 speed starting out in 2nd gear. We consequently we badly wore out the clutch in the hills in northern Alabama, and when we traded in at only 60K miles, I barely made it to dealership with clutch slipping so bad!

 

[Oddball]

Actually, light pinging is just fine and actually ideal; it means engine is running at maximum efficiency.

Not a true statement.

Pinging (pre-detonation) is caused when the air/fuel mixture does not ignite at the optimal moment.

A computer-controlled engine that has the ability to retard and advance timing can tolerate light pinging , but it is not ideal.

In regards to hot temperatures, this can happen when the heat generated by the act of the air being compressed in the cylinder causes the fuel to ignite (autoignition) before the spark plug ignites the fuel.

Basically, the piston is on the upward stroke, the fuel mixture ignites prematurely, causing an explosion in the cylinder and attempts to force the piston to downstroke before it has reached TDC. This causes great stress on the crank, rod, piston and bearings.

As Mr., Mackey would say "This is bad, Mkay."

Higher octane fuel has a higher autoignition temperature. and is better able to resist pre-detonation than regular fuel.

 

[Aufgeblassen]

Higher octane fuel has a higher autoignition temperature. and is better able to resist pre-detonation than regular fuel.

But like I said, if you have NO pre-ignition, higher octane does absolutely nothing. Slight pinging during acceleration is no big deal at all. A very small percentage of the time you would have it.

Occasional light knocking or pinging won't harm your engine, and doesn't mean you need a higher octane.

Will higher octane gasoline clean your engine better?
No. High octane gasoline doesn’t outperform regular octane in preventing engine deposits from forming, in removing them, or in cleaning your car's engine. This is a myth. Save your money.

Unless your engine is knocking, buying higher octane gasoline is a waste of money. Premium gas costs 15-20 cents per gallon more than regular.. Studies indicate that altogether, drivers may be spending hundreds of millions of dollars each year for higher octane gas than they need.

It may seem like buying higher octane “premium” gas is better for engine performance, but take note: the recommended gasoline for most cars is regular octane. If you car recommends regular fuel than putting a higher octane will be a waste of money. It won't make your car perform better, go faster, get better mileage, or run cleaner.

High Octane Fuel Myth or Fact? - Pearl City Auto Works

 

[Oddball]

Use Google and argue all you want. You do not know what you are talking about.

 

[Aufgeblassen]

Use Google and argue all you want. You do not know what you are talking about.

I can post a buttload of articles saying same exact thing, but I won't bother. Some people's minds are just made up!

 

[Oddball]

I can post a buttload of articles saying same exact thing, but I won't bother. Some people's minds are just made up!

When you can't win an argument, you change the argument. You went from pre-ignition is good to if you don't have pre-ignition, higher octane fuel is a waste of money. I don't think you know the first thing about the inner working of an engine, so you use google to play along. I've been building engines for over 50 years, my first one was a single cylinder go-cart engine in 1970, my current one is a 351W for my 67 Mustang. I doubt you will win an argument with me when it comes to gas engines,but you are welcome to try.

 

[Aufgeblassen]

When you can't win an argument, you change the argument. You went from pre-ignition is good to if you don't have pre-ignition, higher octane fuel is a waste of money. I don't think you know the first thing about the inner working of an engine, so you use google to play along. I've been building engines for over 50 years, my first one was a single cylinder go-cart engine in 1970, my current one is a 351W for my 67 Mustang. I doubt you will win an argument with me when it comes to gas engines,but you are welcome to try.

If some pre-ignition was BAD for an engine, then our '81 Fairmont neither would not have been designed that way with a lean "feedback carburetor" (i.e. too many warranty repairs) or ours would not have lasted 60,000 miles!

 

[Mrchips0401]

Here’s my #after a full tank of gas 80% city highway and20% city
View attachment 3078

2 miles to empty…..you are a brave soul

 

[Aufgeblassen]

2 miles to empty…..you are a brave soul

Not really. 601.6/45.7= 13.16 gallons. So probably 0.6 gallons left. If filler tube was filled in addition to the tank, then even more left.

My '98 Jetta TDI had only a low fuel light, and I used to routinely go 50 miles further before refueling.

One time, my wife ran fuel really low, and when I filled up, it took about 1/2 gallon more than tank size. I told her if she ever runs out, she can push it to station, while I steer!

 

[jpcmspada]

I finally received email week of May 1st Build date on LARIAT hybrid .After 8 months. Still waiting on xl order of 10/10/2021. Crazy!!!!

 

[Aufgeblassen]

Still waiting on xl order of 10/10/2021. Crazy!!!!

What a difference a day makes! I ordered the day before you, and got my bare bones XL (except for trailer hitch) on 1/7/23.