Regular Fuel
#2
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#4
RE: Regular Fuel
In the UK regular unleaded is 95 octane. Super unleaded is 97 octane and in some places 99 octane.. On the fuel cap it recommends minimum of 91 octane.
So your 84 must be below standard for the engine unless it is modified for the U.S.
With 95 octane my average is 37mpg.
2000 S40 1.8 XS
So your 84 must be below standard for the engine unless it is modified for the U.S.
With 95 octane my average is 37mpg.
2000 S40 1.8 XS
#5
#7
RE: Regular Fuel
thats absurd...use regualr unleaded and then once you hear the damage upgrade?! Not very good advice...the reason you use premium octane in a turbocharged car is because your car relies on the high octane for the turbocharger. In my opinion there's no debate on what sort of gas to use in any turbocharged vehicle.
#9
RE: Regular Fuel
The "norm" here in Texas is: 87 - 89 - 91/92
BUT, this is the difference..............
In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States, Canada and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, would be 91-92 in Europe. However most European pumps deliver 95 (RON) as "regular", equivalent to 90-91 US (R+M)/2, and even deliver 98 (RON) or 100 (RON).
BUT, this is the difference..............
In most countries (including all of Europe and Australia) the "headline" octane that would be shown on the pump is the RON, but in the United States, Canada and some other countries the headline number is the average of the RON and the MON, sometimes called the Anti-Knock Index (AKI), Road Octane Number (RdON), Pump Octane Number (PON), or (R+M)/2. Because of the 8 to 10 point difference noted above, this means that the octane in the United States will be about 4 to 5 points lower than the same fuel elsewhere: 87 octane fuel, the "regular" gasoline in the US and Canada, would be 91-92 in Europe. However most European pumps deliver 95 (RON) as "regular", equivalent to 90-91 US (R+M)/2, and even deliver 98 (RON) or 100 (RON).
#10
RE: Regular Fuel
+1 to banditz71. Excellent explanation. You have to watch the AKI/Rons. Here in the states, I got about 10% better fuel mileage with premium vs. regular, and I check every tank. The extra cost here in PA is about 11%. Since the manual said regular is acceptable, but premium is recommended, and everywhere I read says the higher octane is better for turbo longevity, I use premium. Never had knocking on regular, just for 1% net cost, I figure it will pay off later in terms of length of service.
#11
RE: Regular Fuel
65 mustang is correct.... a couple of years ago, I tried 2 tanks of regular (87) just to see if there was any difference. Performance wise was about the same, however, my MPG also was off by about 10% which easily cancelled out any $$$ savings.
Stick with the premium.
'02 V40.
Stick with the premium.
'02 V40.
#13
RE: Regular Fuel
I have 86,000 + miles on my 01 s40 and I ve been using 89 since I bought it ......
gas has been getting very expense so I switched to 87 this week with no noticable issues
except the money thats staying in my pocket...........
ive also noticed when i go to the gas station every one puts in 87 lol
gas has been getting very expense so I switched to 87 this week with no noticable issues
except the money thats staying in my pocket...........
ive also noticed when i go to the gas station every one puts in 87 lol
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#16
RE: Regular Fuel
I have to jump in, I used regular for a long time in mine and finally wised up and starting using premium...mileage got better for my long trips from Milwaukee to Cincy..but I also noticed a performance boost as well..and no it's not in my head!
the higher the rating the better it runs through your car, if you wanted to use 87 you should have bought a focus or a cavalier...these are Volvo's people!! take care of your babies!
the higher the rating the better it runs through your car, if you wanted to use 87 you should have bought a focus or a cavalier...these are Volvo's people!! take care of your babies!
#17
Bump...new '09 S40 owner (T5 AWD) here...
According to the owner's manual you should be able to run 87 octane without an impact to engine reliability. That said, I'm wondering if putting in premium will make a difference...
I'm also wondering if I'll get enough of an increase in MPG with premium to compensate for at least most of the additional cost.
According to the owner's manual you should be able to run 87 octane without an impact to engine reliability. That said, I'm wondering if putting in premium will make a difference...
I'm also wondering if I'll get enough of an increase in MPG with premium to compensate for at least most of the additional cost.