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Discussion Starter · #1 ·
I just ordered a 2007 S4p 2.4i. I've gotten three different opinions on what grade gas to use, all from Volvo sales and service staff. Anyone know the answer to this question. Regular, Mid-grade or Super? The mechanic at th ZVolvo dealer said regular, the sales person sas mid-grade, the franchise owner says only Super.<br>Thanks
 

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Re: What grade gas to use (Charles847)

For a non turbo, I would think that 87 (aka regular) is fine though I don't know what the manual specifically recommends.
 

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Re: What grade gas to use (Charles847)

You'll get 100 different opinions here as well. I use Shell regular and get about 29 mpg in 75 hwy / 25 cty driving. <p>
 

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Re: What grade gas to use (CINCYFAN)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>CINCYFAN</b> »</i></TD></TR><TR><TD CLASS="quote">You'll get 100 different opinions here as well. I use Shell regular and get about 29 mpg in 75 hwy / 25 cty driving. </TD></TR></TABLE><p>Ditto. Except I get about 27.5 or 28mpg on regular with my T5 at those speeds and with that mix of city/highway. <p>Opinion (not sure if this is "fact): Waste of money to use anything other than regular on a non-turbo engine. Whats up for debate is whether I should be using Premium with my T5.
 

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Re: What grade gas to use (MagoonR)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>MagoonR</b> »</i></TD></TR><TR><TD CLASS="quote">For a non turbo, I would think that 87 (aka regular) is fine though I don't know what the manual specifically recommends.</TD></TR></TABLE><p>The manual does state that "Volvo engines are designed for optimum performance on unleaded premium gasoline with an AKI octane rating of 91 or above" also "the minimum octane requirement is AKI 87".<p>I am not sure about the non turbo engine (although the manual makes no distinction) but there has been anecdotal evidence posted on this forum that the mpg increase seen when using premium fuel more than offsets the increased cost.<p>Cheers<br>UKMatt
 

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Re: What grade gas to use (ukmatt)

I tried 87, 89 and premium (92) on my S40. It appears that the engine is quiter with 92, and loudest with 87. However, I get the best gas mileage with 89.
 

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Re: What grade gas to use (radoncgs)

Volvo may say it runs best at 91 , you can still run 87, just might be a tad less power and if you are running a chip or ecu tuning of any kind, it may still run at low octane but you wont get the power gain. I run 93 for my bsr , but a non turbo non mod person wanting to save can run 87.
 

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Re: What grade gas to use (V50_T5)

I tried both reg and premium on my NA S70, felt no difference at all.<br>Heard a lot of voices that there's no sense to run premiun on a non-turbo car and tend to agree<p>My 2c
 

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Re: What grade gas to use (V50_T5)

It's ALL about Cylinder pressure & temperature. If You had a vacuum/boost gauge on Your S40/V50 and never dropped below 6-8 inches of vacuum or got into boost on a T5 and didn't lug the engine 87 would be fine. The 2.4i has higher compression, something like .4 to one greater which increases cylinder pressure and raises octane requirements. Also sustained high rpm & load operation increases cylinder temperature which raises octane requirement before the onset of detonation/pinging. <br> Since most of Our operation is part throttle all of Us COULD run 87 without problems except when traffic conditions require that occasional moment of heavy throttle. That's why most of Us run 91 or 93 octane.
 

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Re: What grade gas to use (ukmatt)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>ukmatt</b> »</i></TD></TR><TR><TD CLASS="quote">but there has been anecdotal evidence posted on this forum that the mpg increase seen when using premium fuel more than offsets the increased cost.<br>UKMatt</TD></TR></TABLE><p>is this really true? I seem to get worse gas mileage with 93 but maybe thats just because I drive harder with it <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0">
 

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Re: What grade gas to use (tayk47)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>tayk47</b> »</i></TD></TR><TR><TD CLASS="quote"><p>is this really true? I seem to get worse gas mileage with 93 but maybe thats just because I drive harder with it <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0"> </TD></TR></TABLE><p>As I said - it's anecdotal evidence but I am pretty sure Tom (tmtalpey) posted a while ago that he saved money by using premium as the cost per gallon was more than offset by the increased miles per gallon.<p>UKMatt
 

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Re: What grade gas to use (V50_T5)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>V50_T5</b> »</i></TD></TR><TR><TD CLASS="quote">supposely the higher grades have more detergents which keep your engine cleaner . I'd stick or upgrade to 91 for a NA engine, or run 93 + for turbo/ modded turbo applications. </TD></TR></TABLE><p>Unless you live in CA in which case 91 IS premium gasoline!<p>UKMatt
 

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Discussion Starter · #14 ·
Re: What grade gas to use (Charles847)/More Power from a 2.4i

Thanks for all of your helpful comments. Based on all I've heard so far. I'm going to stick with mid-grade or above for my new Volvo. Certianly doesn't sound like it will hurt anything.<p>Also, if anyone knows way to get a little more power from my 2.4i, I'm open to suggestions. I Love the car, can't wait to drive it, but if I could have affoarded it, would have purchased the T5.<br>Thanks.
 

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Re: What grade gas to use (ukmatt)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>ukmatt</b> »</i></TD></TR><TR><TD CLASS="quote"> Tom (tmtalpey) posted a while ago that he saved money by using premium as the cost per gallon was more than offset by the increased miles per gallon.</TD></TR></TABLE><br>In our older NA 850, and our current 2.5T XC90, I observe about a 10% fuel economy improvement when using Mobil 93 octane over Mobil 89, the next lower grade here.<p>I haven't run anything but 93 in my V50, so I can't report on that. Nor do I want to.<p>Tom.
 

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Re: What grade gas to use (tmtalpey)

We were told by our dealer that it's ok to use a lower grade fuel because Volvo has a filter that will prevent knocking later in the cars life and that there are no benefits of using a higher grade gas. <p>
 

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Re: What grade gas to use (CindyInItaly)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>CindyInItaly</b> »</i></TD></TR><TR><TD CLASS="quote">We were told by our dealer that it's ok to use a lower grade fuel because Volvo has a filter that will prevent knocking later in the cars life and that there are no benefits of using a higher grade gas. </TD></TR></TABLE><p>It's true that lower octane won't hurt the car due to knock sensor and such, but it will lower your mpg and performance. At these high prices, it pays to use premium.<br>
 

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Re: What grade gas to use (V50_T5)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>V50_T5</b> »</i></TD></TR><TR><TD CLASS="quote">supposely the higher grades have more detergents which keep your engine cleaner . I'd stick or upgrade to 91 for a NA engine, or run 93 + for turbo/ modded turbo applications. </TD></TR></TABLE><p>This is why I only use Shell gas. It qualifies as a "top tier" fuel. From toptiergas.com:<p><B>TOP TIER Detergent Gasoline Retailers<p>Gasoline retailers must meet the high TOP TIER standards with all grades of gasoline to be approved by the automakers as providing TOP TIER Detergent Gasoline. <p>In addition, all gasoline outlets carrying the brand of the approved retailer must meet the TOP TIER standards. <p>Additional gasoline retailers are added to the TOP TIER list as they meet the standards. The retailers known to be on the TOP TIER list are shown below. <p>TOP TIER Gasoline Retailers: <p>QuikTrip<br>Chevron<br>Conoco<br>Phillips<br>76<br>Shell<br>Entec Stations<br>MFA Oil Company<br>Kwik Trip/Kwik Star<br>The Somerset Refinery, Inc.<br>Chevron-Canada<br>Aloha Petroleum<br>Tri-Par Oil Company<br>Shell-Canada</B>
 

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Re: What grade gas to use (CindyInItaly)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>CindyInItaly</b> »</i></TD></TR><TR><TD CLASS="quote">We were told by our dealer that it's ok to use a lower grade fuel because Volvo has a filter that will prevent knocking later in the cars life and that there are no benefits of using a higher grade gas. </TD></TR></TABLE><p>all modern volvos have knock sensors which will detect knock and the ECU will dial back timing if that happens. as far as i know, there is no such thing as a "filter" to prevent knock.<p>as far as im aware, for the 2.4i, its okay to use 95RON (not sure what the US conversion is for that though)<p>
 

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Re: What grade gas to use (volvoNB)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>volvoNB</b> »</i></TD></TR><TR><TD CLASS="quote">It's true that lower octane won't hurt the car due to knock sensor and such, but it will lower your mpg and performance. At these high prices, it pays to use premium.</TD></TR></TABLE><p>Not if the price of premium is more than the mpg differential. The performance difference in terms of hp is not great and probably most (only?) noticable on the top end. How often do you drive WOT?<p>Many Honda 4's are the same compression as the Volvo NA's (10.5:1) and all are spec'd for regular gas.<p>As far a "filters" go, just think of it as an "electronic filter..."
 
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