91 RON or 95 RON fuel?

Question

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 · Accepted Answer

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

Chuck Fiedler · Answer

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 · Answer

That is mostly correct.  Many modern cars do retard ignition timing andwork adequately with regular gas.  My experience is that turbo-chargedVolvos with modern engines ping with regular fuel.Beverly

Lloyd Wells · Answer

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.

91 RON or 95 RON fuel?

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