Premium Gas

[churp]

You must have a different owners manual, mine states:

SELECT OCTANE RATING 87 (RESEARCH OCTANE NUMBER 91) OR HIGHER.

This is page 178 in my owners manual. Obviously they know what a few of us are trying to pass on here!!!!!!!!!!!!!!!

The tests have been done before higher octane was ever put on the market (probably the 30's). The ECU has taken the "must have" higher octane in your car away....but it hasn't removed the fact that performance and milage will improve in most engines with it. Note that I am not saying it is cheaper to put the higher octane in....but where I live it's very feasable (Iowa and South Dakota 89 octane is the same price or cheaper than 87, and in Minnesota I get 89 for 2 cents more than 87) and I use 89 octane.

[jdium]

Originally Posted by churp

The tests have been done before higher octane was ever put on the market (probably the 30's).

lol. Ya. Back when everything ran on leaded gas...

my head hurts...

[churp]

Originally Posted by jdium

lol. Ya. Back when everything ran on leaded gas...

my head hurts...

Don't quite understand Cars ran on unleaded in the US until 1970. I'm pretty sure sex was even invented by then!

No, I'm actually positive first hand, sex was invented before 1970.

[jdium]

Originally Posted by churp

Don't quite understand Cars ran on unleaded in the US until 1970. I'm pretty sure sex was even invented by then!

No, I'm actually positive first hand, sex was invented before 1970.

Which brings me to my other point, don't smoke crack...

Most every gas was LEADED (no UN) before 1970. Leaded gas has a realative octane rating of todays "race' gas, like 110 or something...

[churp]

Originally Posted by jdium

Which brings me to my other point, don't smoke crack...

Most every gas was LEADED (no UN) before 1970. Leaded gas has a realative octane rating of todays "race' gas, like 110 or something...

Wrong, read WRBlues post.

Thanks WRBlue for correcting me....1970 was when the compression ratio dropped in the US....along with performance.

[Yarii]

They're not telling you to run higher octane... They're just putting the RON in brackets because the entire world except north america uses RON to measure octane. In NA our pumps are labled with the average of the RON and MON measurements, which is generally 4 or 5 points lower. 87 octane gasoline in north american is 91 RON.

Originally Posted by churp

You must have a different owners manual, mine states:

SELECT OCTANE RATING 87 (RESEARCH OCTANE NUMBER 91) OR HIGHER.

This is page 178 in my owners manual. Obviously they know what a few of us are trying to pass on here!!!!!!!!!!!!!!!

The tests have been done before higher octane was ever put on the market (probably the 30's). The ECU has taken the "must have" higher octane in your car away....but it hasn't removed the fact that performance and milage will improve in most engines with it. Note that I am not saying it is cheaper to put the higher octane in....but where I live it's very feasable (Iowa and South Dakota 89 octane is the same price or cheaper than 87, and in Minnesota I get 89 for 2 cents more than 87) and I use 89 octane.