gasoline

Thanks. I know for a fact 87 is the required octane. I had already
read that from honda.com on the CR-V prior to purchase. Some cars
like Infiniti require (suggest??) 91 and that can be a pain to
remember if you have other cars at the same time using 87. I guess
I'll just stick with 87.

Any opinion on gas additives? Honda.com says nothing about this so I
imagine the same answer here. I guess I have a hard time accepting
87 for life <grin>. Thanks Tegger.

 

Appreciate the help. I know for my new CR-V, 87 is all that is
required. I read and asked when I purchased it but I still wondered
if the old rule in this new Honda could still apply. For a while I
did this for my 2003 when it was new and in the last year or so did
not and I can't tell any difference.... no knocks, pings or whatever.[/QUOTE]

well, the rule is still kinda there, in a way, but you have to
understand the underlying reasoning behind the old "use 91 octane every
now and then" story. It was about detergents, plain and simple.

Octane level in and of itself has zero bearing on how well the engine
runs or what kind of power you can get. The manufacturer specifies an
octane level of fuel; going above that isn't "better" gas and doesn't
"give you more power". Especially nowadays, when the computers tune the
engine dymanically as you drive. The computers have fuel/air maps set
into them from the engineers, and programmed responses to knock and
oxygen sensors and whatnot, and providing a fuel with higher octane
doesn't change the computer programming.

 

Appreciate the help. I know for my new CR-V, 87 is all that is
required. I read and asked when I purchased it but I still wondered
if the old rule in this new Honda could still apply. For a while I
did this for my 2003 when it was new and in the last year or so did
not and I can't tell any difference.... no knocks, pings or whatever.[/QUOTE]

well, the rule is still kinda there, in a way, but you have to
understand the underlying reasoning behind the old "use 91 octane every
now and then" story. It was about detergents, plain and simple.

Octane level in and of itself has zero bearing on how well the engine
runs or what kind of power you can get. The manufacturer specifies an
octane level of fuel; going above that isn't "better" gas and doesn't
"give you more power". Especially nowadays, when the computers tune the
engine dymanically as you drive. The computers have fuel/air maps set
into them from the engineers, and programmed responses to knock and
oxygen sensors and whatnot, and providing a fuel with higher octane
doesn't change the computer programming.

 

Honda specifically warns against the use of additives of any kind.
(Honda Service News, May 2001).

 

Honda specifically warns against the use of additives of any kind.
(Honda Service News, May 2001).

 

I used to add the Techron stuff once in a while, then I stopped doing
that years ago. I can not tell any difference except that I now spend
less on gas additives.

Pat

 

I used to add the Techron stuff once in a while, then I stopped doing
that years ago. I can not tell any difference except that I now spend
less on gas additives.

Pat

 

Speaking of, if anyone here has experience with the Wintec Tec3 engine
management system, I have a couple of questions on something before I
make some adjustments to the current settings.

http://www.electromotive-inc.com/products/wintec3d.html

Thanks,

Pat

 

Speaking of, if anyone here has experience with the Wintec Tec3 engine
management system, I have a couple of questions on something before I
make some adjustments to the current settings.

http://www.electromotive-inc.com/products/wintec3d.html

Thanks,

Pat

 

I add nitrogen to my tank. Or at least Shell tells me I do.

The last additive I used to gasoline was STP. Back around 1974.
--

- dillon I am not invalid

I love my country, It's my government I fear.

Hey, turnabout's fair play.

 

I add nitrogen to my tank. Or at least Shell tells me I do.

The last additive I used to gasoline was STP. Back around 1974.
--

- dillon I am not invalid

I love my country, It's my government I fear.

Hey, turnabout's fair play.

 

It wasn't even valid when I bought my 84 Escort:

"There is no reason to use any fuel with an octane number above the
recommended value." Geez, this was FORD saying this. Back when they
finally decided that they might just experiment with fuel injection.
By using a system that had been in place in European built Fords for
several years.

How big is a CR-V's tank? Around here the diff between 87 and 91 is
around 25 cents. 20 gallons? That's almost two cups of Starbucks
coffee. Or a half pound of good coffee beans.

Heh, the IS250 we test drove said that 91 was required to get the
performance numbers listed, but that it would function without
difficulties on 87.

--

- dillon I am not invalid

I love my country, It's my government I fear.

Hey, turnabout's fair play.

 

It wasn't even valid when I bought my 84 Escort:

"There is no reason to use any fuel with an octane number above the
recommended value." Geez, this was FORD saying this. Back when they
finally decided that they might just experiment with fuel injection.
By using a system that had been in place in European built Fords for
several years.

How big is a CR-V's tank? Around here the diff between 87 and 91 is
around 25 cents. 20 gallons? That's almost two cups of Starbucks
coffee. Or a half pound of good coffee beans.

Heh, the IS250 we test drove said that 91 was required to get the
performance numbers listed, but that it would function without
difficulties on 87.

--

- dillon I am not invalid

I love my country, It's my government I fear.

Hey, turnabout's fair play.

 

I have done the experiment on the last three Hondas to see if 91 made any
difference to the mileage or apparent (as perceived by the driver)
performance.

The '96 Odyssey specified 87 octane. Tried 89. no difference. tried 91. no
difference.

The '00 Acura TL specified 91. Tried 87. Mileage drop of 3 MPG but it
didn't ping on hard acceleration either. Conclusion - the ECU did adjust
for the gas.

The '05 CR-V specifies 87. Tried 89. Tried 91. No difference in mileage
or perceived performance. Conclusion - it really is designed for 87.

Now my new G37S (basically a 4 door 370Z with leather seats) requires 91 and
the owners manual says 87 can be used in an emergency, but should be mixed
with at least half a tank of 91 and switched back to completely 91 as soon
as possible. I don't plan to experiment with this one.

 

I have done the experiment on the last three Hondas to see if 91 made any
difference to the mileage or apparent (as perceived by the driver)
performance.

The '96 Odyssey specified 87 octane. Tried 89. no difference. tried 91. no
difference.

The '00 Acura TL specified 91. Tried 87. Mileage drop of 3 MPG but it
didn't ping on hard acceleration either. Conclusion - the ECU did adjust
for the gas.

The '05 CR-V specifies 87. Tried 89. Tried 91. No difference in mileage
or perceived performance. Conclusion - it really is designed for 87.

Now my new G37S (basically a 4 door 370Z with leather seats) requires 91 and
the owners manual says 87 can be used in an emergency, but should be mixed
with at least half a tank of 91 and switched back to completely 91 as soon
as possible. I don't plan to experiment with this one.

 

There was a thread in rec.autos.tech on that a while back. It seems
nitogen-based detergents are part of /all/ fuel makers' additive packages.

Shell's "nitrogen enhanced" thing appears to be just marketing bumpf,
possibly tied to an increase in one of those additives. Last time I
checked, there was a complete lack of any sort of technical information on
Shell's website regarding nitrogen-based additives.

 

There was a thread in rec.autos.tech on that a while back. It seems
nitogen-based detergents are part of /all/ fuel makers' additive packages.

Shell's "nitrogen enhanced" thing appears to be just marketing bumpf,
possibly tied to an increase in one of those additives. Last time I
checked, there was a complete lack of any sort of technical information on
Shell's website regarding nitrogen-based additives.