uphill, with a/c, high altitude, & a trailer: use premium gas?
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
Of course driving on level ground at higher altitudes allows a lower octane
to be used. Driving uphill from lower altitudes doesn't give that same
ability.
Jerry
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
"RoyJ" <spamless@microsoft.net> wrote in message
news:EAGOc.3806$cK.3425@newsread2.news.pas.earthli nk.net...
> Actually, as you go up in altitude you can usually get by with a lower
> octane. Thinner air means lower psi in the cylinder which is a lower
> effective compression ratio. In Colorado it's common to find 85 octane
> gas in the mountains. I don't reccomend it and neither does the owner's
> manual but it doesn't ping when you rattle around at 8000 feet and up.
>
> Handywired wrote:
>
> > .... in my 4.0L TJ?
> >
> > Manual says use 87 octane and that's just great. Should I up the octane
any as
> > I head up to 6K feet with my family, a camping trailer, the A/C blowin',
etc?
> >
> > -jeff
to be used. Driving uphill from lower altitudes doesn't give that same
ability.
Jerry
--
Jerry Bransford
PP-ASEL N6TAY
See the Geezer Jeep at
http://members.***.net/jerrypb/
"RoyJ" <spamless@microsoft.net> wrote in message
news:EAGOc.3806$cK.3425@newsread2.news.pas.earthli nk.net...
> Actually, as you go up in altitude you can usually get by with a lower
> octane. Thinner air means lower psi in the cylinder which is a lower
> effective compression ratio. In Colorado it's common to find 85 octane
> gas in the mountains. I don't reccomend it and neither does the owner's
> manual but it doesn't ping when you rattle around at 8000 feet and up.
>
> Handywired wrote:
>
> > .... in my 4.0L TJ?
> >
> > Manual says use 87 octane and that's just great. Should I up the octane
any as
> > I head up to 6K feet with my family, a camping trailer, the A/C blowin',
etc?
> >
> > -jeff
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
>From: RoyJ spamless@microsoft.net
>as you go up in altitude you can usually get by with a lower
>octane.
thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
is 85.5. i often wondered why it was different out here, thanks for the
information!
to answer the original question i had no problems with my rubicon at 11,000
feet. i wasnt towing anything but was climbing really steep grades with no
noticeable loss in power. http://tinyurl.com/3bgzf
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
MontanaJeeper wrote:
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
MontanaJeeper wrote:
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
MontanaJeeper wrote:
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
MontanaJeeper wrote:
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
I had no problems around/near 14,000 feet with regular. Purred like a
kitten.
--
__________________________________________________ _________
tw
03 TJ Rubicon - Rubicon Express 4.5"
01 XJ Sport
There is a very fine line between "hobby" and "mental illness."
-- Dave Barry
Pronunciation: 'jEp
Function: noun
Date: 1940
Etymology: from g. p. (G= 'Government' P= '80 inch wheelbase')
A small general-purpose motor vehicle with 80-inch wheelbase,
1/4-ton capacity, and four-wheel drive used by the U.S. army in
World War II.
(Please remove the OBVIOUS to reply by email)
__________________________________________________ _________
Guest
Posts: n/a
Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
The owner's manual doesn't reccomend the lower octane for late model
engines. Something about the various sensors not givng the computer the
correct info. Not sure which one might be involved, the O2 sensor should
be happy no matter what. Might be the MAF sensor.
As a side note: the lower octane should have a slightly higher BTU per
pound content = better gas mileage.
MontanaJeeper wrote:
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
engines. Something about the various sensors not givng the computer the
correct info. Not sure which one might be involved, the O2 sensor should
be happy no matter what. Might be the MAF sensor.
As a side note: the lower octane should have a slightly higher BTU per
pound content = better gas mileage.
MontanaJeeper wrote:
>>Subject: Re: uphill, with a/c, high altitude, & a trailer: use premium gas?
>>From: RoyJ spamless@microsoft.net
>
>
>>as you go up in altitude you can usually get by with a lower
>>octane.
>
>
> thats interesting. in north carolina @ 80 ft. elevation the "regular" unleaded
> is 87 octane. here in montana from 3500 to 11,000 feet the "regular" unleaded
> is 85.5. i often wondered why it was different out here, thanks for the
> information!
>
> to answer the original question i had no problems with my rubicon at 11,000
> feet. i wasnt towing anything but was climbing really steep grades with no
> noticeable loss in power. http://tinyurl.com/3bgzf
