91 RON or 95 RON fuel?

[snoopy42]

hi guys,

will it make any difference to fuel consumption and power using 95 RON fuel
against 91 RON fuel in a 89 240 or am i wasting my $$$ usung the higher RON
fuel?

 

[rastlouis]

I bought a 92 240 wagon a month ago, and the mechanic who maintained it
said I should just use regular (89) octane fuel in it. I have been
doing that and have had good results. 28mpg (imperial). Based on
that, I would think 95 octane to be a waste of money, especially at the
price of gas these days! (over $1/L in Canada).

 

[Chuck Fiedler]

More than one study has shown that using "regular" gas gives not
significantly different results than any other grade. Cars are now
computerized and they make adjustment for the grade of gas used.

Admittedly, using higher grades of gas speeds the flow of $ from your
pocket.

Chuck Fiedler

 

[Bev A. Kupf]

More than one study has shown that using "regular" gas gives not
significantly different results than any other grade. Cars are now
computerized and they make adjustment for the grade of gas used.

Admittedly, using higher grades of gas speeds the flow of $ from your
pocket.

That is mostly correct. Many modern cars do retard ignition timing and
work adequately with regular gas. My experience is that turbo-charged
Volvos with modern engines ping with regular fuel.

Beverly

 

[Lloyd Wells]

More than one study has shown that using "regular" gas gives not
significantly different results than any other grade. Cars are now
computerized and they make adjustment for the grade of gas used.

Admittedly, using higher grades of gas speeds the flow of $ from your
pocket.

Chuck Fiedler

When I first got my '01 S-40 I kept records of my gas milage using different
grades of gas. While it ran just fine with regular and middle grade gas,
the gas mileage went down, compared to the recomended premium. After
figuring out the relative costs per mile, it turned out that running premium
was only costing me 2 or 3 cents more per gallon.