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I was just posting a question about gas. I just got a silver 2003 S60 T5 5-speed manual and wondering if premium gas is absolutely necessary. Has anyone used 87 and gotten knocking or had problems. I will probably continue to use premium but in case I get in a bind just wondering.
 

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Re: What type of gas should be used (schofieldj1)

Modern engines won't knock since the computer will retard timing (ie. performance) to compensate. You will notice a bit less performance (especially in the heat) and perhaps a bit less MPG on regular.
 

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Re: What type of gas should be used (schofieldj1)

Of course you realize that because the color is silver, that changes everything about what grade of gas to use. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/tongue.gif" BORDER="0">
 

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Re: What type of gas should be used (samulsoon_0503)

Both my veh's will only see premium. <p>Vroom, vroom<p>Oh wait, that's mazda. But, then again, mazda is ford, and ford is volvo...<p>so yeah, vroom vroom<br> <br><IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0"> <p>Tim <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/embeer.gif" BORDER="0">
 

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Re: What type of gas should be used (schofieldj1)

In my MY04 S60 NA there is a significant difference in power between 87 vs 91. I have very good hearing and, under certain conditions, I can hear the engine pinging when I use 87. Using 91 only now. The S60 $55 gas tank is here.
 

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Hi,<br>I'm in UK & get the choice of 95 or 97 oct, and must say that the car definately performs better on 97. the MPG goes up and the car feels quite alot faster.<br>Hope this helps
 

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If the car calls for premium, you can probably get away with regular, but you are going to lose performance and, more importantly, your fuel economy will suffer.<p>Remember, the most important fuel cost is not the cost of a gallon of gas, it is the cost to drive a mile (or kilometer as the case may be). Fuel that costs more per gallon is likely to cost less per mile/KM especially if your engine calls for the premium stuff.<p>If you'd like to experiment with the different grades of fuel and see which is actually cheaper to use, I made a website that helps you track the differences. I actually created it because I am obsessive about tracking my own fuel economy and wanted to be able to enter my fill-ups anywhere. Once I had that, I figured it would be a good learning experience to make it so anyone could use it if they wanted. Anyway, if you want, check it out at <A HREF="http://www.brianbauer.org/viewdata.php" TARGET="_blank">http://www.brianbauer.org/viewdata.php</A>
 

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Re: (Brian_B)

I don't know about the NAs or LPTs, but the manual and service guys say premium 91 is recommended on my car. The key word is recommended. I've been using the middle grade 89 octane due to the high gas prices. Hope I can get away with it.<br>
 

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Re: (blackTT55)

when I first got my S60 I used 87, and I got ~25 on the highway. Well, after a couple tanks, I switched to 93 and ever since I get ~29. Plus, you can really tell the difference between the grades of gas. A lot more pep. Heck, even using 89 there's a difference. If you figure it out, its actually cheaper to get the premium because you get better mileage. I'm still waiting to try 100+...I think I'll get hooked <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0">
 

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Re: (deep60)

The difference in price between 89 octane and 93 octane where I buy my gas is $0.20/gal. If I buy 20 gallons it would be a difference of $4.00. The recommended fuel for my T-5 is 91 octane which would be $0.10/gal. cheaper than the premium 93 octane,saving me $2.00 for every 20 gallons purchased.<br>I don't care if I save $2.00 every time I buy $60.00+ worth of fuel. I use 93 octane in my S60 T-5 and my wifes V70 XC exclusively.
 

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Because of Gas prices, I use midgrade, i believe thats 89 octane? I figure its not as bad as 87, should be a little better. Ive always been someone who always uses premium, but ive decided with recent prices to cut back to the midgrade, hopefully this will be fine for the car.<p>Its a 2006 S60 2.5.
 

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Re: (OttawaSensky)

When I first got my car a month ago, I filled regular 87 for the first two tanks trying to save a few bucks. Guess what? The Check Engine light lit up!!! Then, I hurried to switch to 91 octane. And within 200 miles of driving, the light disappeared. I guess my car has an appetite for the expensive fuel even though the manual says it's okay to use the cheap gas.<p>I don't know about better power with 91 octane since I haven't had the chance to run up to 100 mph yet. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0">
 

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Re: (ProcEngr)

Interesting. THe one time I mistakenly filled the tank wiht 87 octane, I was really PO'd at myself, and drive like a grandmoter with a raw egg on the gas pedal. Gas mileage was actually about 5% better, but not a lot of fun, buecase I didn't want to get on it hard.<p>Normal mileage around town with some freeway driving averages 23Mpg. Trips have been a high of a measured 29.7 mpg, (trip meter read 27), to a more normal average of 27.7 mpg. The latter with occasional bursts of speed to pass traffic, or trying to merge on the freeway. The best was driving in rural northern CA and southern Oregon to bring the car home. Only stops were for gas. The normal 27+ is for 150 mile trips, and can be bettered the longer I drive on a tank. <p>Can definitely confirm that the care performs better with 91 octane, and even better with 100 octane. There is a station near me that sells 100 octane, andthe tank after the 87 octane, I put in 5 gallons of 100. Didn't have the chance to get on it, but the next several tanks, the car has been more responsive. I think I "trained" the ECU to a better grade of gas, and now it performs better.
 
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