My wife accidentally put about 9 gallons of 93 Octane in our new 2.5 Outback with 600 miles on it.
Will going back to 87 Octane cause any problems?
Will going back to 87 Octane cause any problems?
That's not much of a problem either. You won't get the rated performance out of the engine, but for everyday use you probably won't notice the difference. The engine controller will make adjustments and move on down the road.It would only be a problem if the car required 93 and she put in 87.
42.I am morbidly curious as to how many posts this thread will generate ...
Better rules of thumb: 1) Higher compression ratios yield higher engine thermal efficiency. 2) In spark-ignition engines, higher compression ratios require higher fuel "octane." 3) For a given compression ratio, higher fuel "octane" allows greater spark advance, which tends to increase engine efficiency. Using lower "octane" fuel usually requires retarding the ignition timing.Rule of thumb: "the lower the octane fuel used the higher the fuel consumption"
no.
however, some recent tests done by AAA have convinced me to use only top tier gasoline. see list here
top tier gasoline Archives - AAA NewsRoom
"YMMV" :smile2:
Fortunately for you, most major retailers now sell Top Tier gas.all grades of gasoline sold under the licensed brands listed below must meet the high standards of TOP TIER™ Detergent Gasoline.