Using Gasoline with a 91 Octane level

[nick rusche]

I was just wondering if anyone out there uses gasoline with a 91 octane level in their 4 cylinder Gen 5 Camry. Do you notice any difference in the car's performance, and does it hurt the car at all?

Thanks!

[CamrySExxx]

Originally Posted by nick rusche

I was just wondering if anyone out there uses gasoline with a 91 octane level in their 4 cylinder Gen 5 Camry. Do you notice any difference in the car's performance, and does it hurt the car at all?

Thanks!

why not get the recommended octane? You know what would be pretty much the same as putting 91 in your gas tank? putting 89 and giving me the difference in money

[CharmCityES]

it does absolutly nothing
the car is rated to run on regular 87-89 octane gasoline...
why spend the extra money when it adds nothing in performance or benefits to the engine?

id tell you too run 92 if you had a V6 engine, as toyota reccomends premium for the 3.0 and 3.3 V6 engines for "optimum performance", but it isnt required.

[white3ch0c0late]

Save your money.

[TRD VVTi]

The only thing that you will gain is extra deposits in the combustion chamber from the slower burn rate of the higher octane fuel under normal conditions.

[JAKSTER]

WHAT IF I PREFER TO USE GASOLINE WITH HIGHER OCTANE RATINGS? You can, but there are no real benefits, other than the gasoline manufacturers making more money off of you. When you use a fuel with a higher octane rating than your vehicle requires, you can send this unburned fuel into the emissions system. It can also collect in the catalytic converter. When you over stress any system, it can malfunction or not do what it was designed to do properly. In the early 90's, an early warning symptom was a rotten egg smell from the tailpipe. Easy fix, go back to using regular 87 octane gasoline. The rude odor usually disappears after several tanks of gasoline.
DOESN'T HIGHER OCTANE GASOLINE HAVE MORE CLEANING ADDITIVES THAT ARE GOOD FOR MY ENGINE?
No. Government regulations require that all gasoline contain basically the same amount of additives to clean the injectors and valves. The only differences are the type to help create the different octane ratings. All gasoline burns at the same rate, it is the additives that create the different octane ratings for the different types of engines.
REFORMULATED GASOLINE
In some major cities with air pollution problems, reformulated gasoline is required. It is an oxygenated fuel, that burns really clean but can slightly lower fuel economy and engine performance. If your engine is really dirty with carbon deposits, it will also cause pinging or premature burn. In these types of situations, you may want to consider stepping up to the next grade of gasoline.
The bottom line is to use the type of gasoline recommended for your engine. In some cases, like towing, or other stresses on the engine, you may find a higher octane fuel helpful.
NOTE: I do not proclaim to be an expert in these matters, but am only presenting an overview of what I have discovered in my work in this industry with the different auto manufacturers.

[giga_dude]

So what you are saying is by fueling higher octane gas it might damage the car?? I am wondering about this because I might move to Germany in July and I will take my Camry with me...but there they only have 95 and 98 octane gas.....

[Gellenole]

I think i'm going to go 89 on my next fill up on my v6 and see what happens.

[Mike Gerber]

Originally Posted by JAKSTER

WHAT IF I PREFER TO USE GASOLINE WITH HIGHER OCTANE RATINGS? You can, but there are no real benefits, other than the gasoline manufacturers making more money off of you. When you use a fuel with a higher octane rating than your vehicle requires, you can send this unburned fuel into the emissions system. It can also collect in the catalytic converter. When you over stress any system, it can malfunction or not do what it was designed to do properly. In the early 90's, an early warning symptom was a rotten egg smell from the tailpipe. Easy fix, go back to using regular 87 octane gasoline. The rude odor usually disappears after several tanks of gasoline.
DOESN'T HIGHER OCTANE GASOLINE HAVE MORE CLEANING ADDITIVES THAT ARE GOOD FOR MY ENGINE?
No. Government regulations require that all gasoline contain basically the same amount of additives to clean the injectors and valves. The only differences are the type to help create the different octane ratings. All gasoline burns at the same rate, it is the additives that create the different octane ratings for the different types of engines.
REFORMULATED GASOLINE
In some major cities with air pollution problems, reformulated gasoline is required. It is an oxygenated fuel, that burns really clean but can slightly lower fuel economy and engine performance. If your engine is really dirty with carbon deposits, it will also cause pinging or premature burn. In these types of situations, you may want to consider stepping up to the next grade of gasoline.
The bottom line is to use the type of gasoline recommended for your engine. In some cases, like towing, or other stresses on the engine, you may find a higher octane fuel helpful.
NOTE: I do not proclaim to be an expert in these matters, but am only presenting an overview of what I have discovered in my work in this industry with the different auto manufacturers.

JAKSTER,

I just read your reply to this thread. This was an excellent and well written response. Well done.

Mike

[giga_dude]

Well I read the Toyota Camry Service manual cover to cover when they discuss gasoline and they only state to "use at least 89 octane or higher." If you use lower octane gas it might damage your engine etc etc....

So I can only hope that when I drive my 4-cyl Camry in Germany that the 95/98 octane gas wont damage the engine....

[TRD VVTi]

Originally Posted by giga_dude

Well I read the Toyota Camry Service manual cover to cover when they discuss gasoline and they only state to "use at least 89 octane or higher." If you use lower octane gas it might damage your engine etc etc....

So I can only hope that when I drive my 4-cyl Camry in Germany that the 95/98 octane gas wont damage the engine....

Do they calculate octane the same way that it's calculated in the U.S.?

[Venom_5]

Jakster - font = too big

giga_dude - are you sure about that?

[Himes]

Higher octane ratings ==> more complete engine combustion.

Harmless if your car gas using higher octane ratings gas. As long as your car using the minimum required rating from your manufacturer.

Only one benefit FOR SURE from using higher octane rating gas is safe the environment. Complete combustion will decreased the amount of carbon monoxide and Nox from your engine.

Hope that help !!!

[geoff5093]

Originally Posted by Himes

Higher octane ratings ==> more complete engine combustion.

Harmless if your car gas using higher octane ratings gas. As long as your car using the minimum required rating from your manufacturer.

Only one benefit FOR SURE from using higher octane rating gas is safe the environment. Complete combustion will decreased the amount of carbon monoxide and Nox from your engine.

Hope that help !!!

I've heard both sides, that using a higher octane gas then whats required will burn better, and I've heard it doesn't burn as clean. I really don't know what to believe, but I see no reason to use whats higher then required.

BTW, the Camry can run on regular unleaded gasoline, it doesn't need 89 or higher.

[Himes]

My explaination was based on the emission test that I did in school on a toyota engine tested with different octane number gasoline. The result proved that higher octane number results in better emission rate. But, I dont think people concerns about what out from their car as long as it pass the smog test . The air intake also critical point for your car. If you have a better air intake manifold and air filter in your car, you might notice the differences in mpg with different octane number gas. Anyway, it still depends on the behavior of how you drive your car.