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Discussion Starter · #1 ·
My gas mileage went up from an avg of 20.9-21.3 to 22.9-23.0, following my last oil change. All I did was change from Mobil 1 to Castrol Edge, no change in driving habits. Is this possible?
 

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Re: Castrol Edge Synthetic Oil (S60R1)

Old viscosity vs new ?
 

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Discussion Starter · #3 ·
Re: Castrol Edge Synthetic Oil (s140s)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>s140s</b> »</i></TD></TR><TR><TD CLASS="quote">Old viscosity vs new ?</TD></TR></TABLE><p>Same for both, 10w-30.<p>The gas mileage started to go up right away.
 

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Re: Castrol Edge Synthetic Oil (S60R1)

warmer out now so tire pressures are up <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/tongue.gif" BORDER="0">
 

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Re: Castrol Edge Synthetic Oil (S60R1)

Your numbers are statistically the same. Also, summer gas blend vs. winter mix increases the energy content slightly.
 

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Discussion Starter · #6 ·
Re: Castrol Edge Synthetic Oil (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">warmer out now so tire pressures are up <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/tongue.gif" BORDER="0"> </TD></TR></TABLE><p>lol<p><br><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>MrTippy</b> »</i></TD></TR><TR><TD CLASS="quote">Your numbers are statistically the same. Also, summer gas blend vs. winter mix increases the energy content slightly.</TD></TR></TABLE><p>I doubt the Hess I use changed mixes the day I changed my oil, and I had gas already and noticed the increase in mileage before a refill. I also did this just a couple of weeks ago, so I'm guessing they've been running the summer mix for a while now.<p>I did run a bottle of octane boost just recently, but it was a good week or two before the oil change, and I didn't see any difference.
 

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Re: Castrol Edge Synthetic Oil (S60R1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>S60R1</b> »</i></TD></TR><TR><TD CLASS="quote">Is this possible?</TD></TR></TABLE><p>no. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0">
 

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Re: Castrol Edge Synthetic Oil (S60R1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>S60R1</b> »</i></TD></TR><TR><TD CLASS="quote"> I also did this just a couple of weeks ago, so I'm guessing they've been running the summer mix for a while now.</TD></TR></TABLE><p>Probably true. Didn't know exactly when you did the switch.<p>Still, the difference is statistically insignificant... Too many variables for you to make a definitive statement.
 

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Re: Castrol Edge Synthetic Oil (MrTippy)

Its possible, if the old oil was, ahem, not any good and maybe cruddy and burned down some. Otherwise, my mileage went up a notch, all at once, just recently. No oil changes for me though. So, if this is down to a switch to summer blend, I'll bet that's what mine was too. I keep a close eye on my mpg too. about .75-1 mpg, combined, higher.
 

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Discussion Starter · #10 ·
Re: Castrol Edge Synthetic Oil (JoeLvo)

Weird. I wonder what did it.
 

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Re: Castrol Edge Synthetic Oil (S60R1)

C'mon now. Unless you are driving exactly the same, hitting all the lights exactly the same, with exactly the same temperatures, the same warm-up times, with exactly the same traffic and fill-ups... the difference you are both seeing is insignificant.
 

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Re: Castrol Edge Synthetic Oil (S60R1)

Ivo, why the change?<p>Now that's thinking with your dipstick. JIMMY!<BR><BR>
<i>Modified by baxteR at 9:34 AM 7-22-2009</i>
 

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Discussion Starter · #13 ·
Re: Castrol Edge Synthetic Oil (MrTippy)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>MrTippy</b> »</i></TD></TR><TR><TD CLASS="quote">C'mon now. Unless you are driving exactly the same, hitting all the lights exactly the same, with exactly the same temperatures, the same warm-up times, with exactly the same traffic and fill-ups... the difference you are both seeing is insignificant. </TD></TR></TABLE><p>It would be for the normal Joe. But I have an 80-100 mile daily commute (M-F) and avg 500 miles a week, 90% highway. Believe me when I tell you that my gas mileage avg does not go up or down by more than 0.1-0.3ish from one week to the next (or from cruising along to a spirited run), and this has been the case for 2 years now, so it was very surprising to me to see such a big bump in a matter of days with no significant difference in my driving. <p>And I do drive nearly the same M-F, same warm-up time, same exact route, not a single different street, same lights, same pedal to the metal schedule, etc., all thanks to rush hour traffic. On the weekends, I drive spirited on the open road, no different from one to the other. My avg gas mileage has always been what I posted in the 1st post for the 2 years I've had the car, going up or down by no more than ~0.5 the most. I don't reset the gas mileage computer, ever, so when you drive as much as I do, even a 2-5min WOT run makes little difference, 0.1-0.2 at most. Not the same with the instant gas mileage meter though, that SOB is all over the map. IIRC the highest I've had it was 99mpg (foot off the gas in 6th gear, slightly downhill) and the lowest something like 4.7mpg (WOT, forget the gear) <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0"><p>I'm not saying it was the oil, or anything else in particular, but my car definately jumped up in gas mileage and is holding it. I'm just wondering why. <p>I've never avg 23 miles/gallon in my weekly driving schedule. I tried once last year, driving like Ms. Daisy was in the back, and the highest I got was 22.4-22.7ish, but it was a slow increase and I drove like a grandmother. This time, it increased right away and I didn't slow down at all, or used higher gears than normal along the way.<p><br><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>baxteR</b> »</i></TD></TR><TR><TD CLASS="quote">Ivo, why the change?<p>Now that's thinking with your dipstick. JIMMY!</TD></TR></TABLE><p>Walmart had a sale a couple of weeks ago, and Castrol advertises "10x better" something over Mobil 1 on the back of the Edge's bottle, either protection or lubrication, I forget which, so I figured I'd try it. I remembered volvo recommended Castrol and I wanted to see if a different brand made any difference. I was actually going to go for the Royal Purple stuff, but they didn't come in 5 quart jugs, and I didn't want to pay ~$8 a quart. Now that's thinking with my dipstick, Jimmy <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0"><BR><BR>
<i>Modified by S60R1 at 11:45 AM 7-22-2009</i>
 

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Re: Castrol Edge Synthetic Oil (S60R1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>S60R1</b> »</i></TD></TR><TR><TD CLASS="quote"><p>It would be for the normal Joe. But I have an 80-100 mile daily commute (M-F) and avg 500 miles a week, 90% highway. Believe me when I tell you that my gas mileage avg does not go up or down by more than 0.1-0.3ish from one week to the next (or from cruising along to a spirited run), and this has been the case for 2 years now, so it was very surprising to me to see such a big bump in a matter of days with no significant difference in my driving.</TD></TR></TABLE><p>I second this. Mr Tippy, you make a very valid point. But the evidence is in the variation seen over the course of a year, when compared to the variation I (and S60R1) saw about 2 months ago, tops. There was a spike, and it's settled there. I'm getting around 1 mpg better. FWIW, it could be down to many things, not just summer-blend gasoline, but there has been a mileage improvement.
 

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MPG always better when you change your oil at first. Your engine is lubed up the best it possibly can be with brand new oil. That said your MPG will fall off after you drive for a while. We are talking 1mpg which is kind of hard to actually measure successfully .
 

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Re: Castrol Edge Synthetic Oil (JoeLvo)

Do a proper analysis over a whole year or more, generate the variances and deviations and you'll see that your observed "difference" is mostly, if not entirely, insignificant. <p>Yes, you may be seeing some increased mileage, but you do not have the data to make any credible statements as to its cause. It could be, and I suspect that it is, due to driving habits, fueling conditions, etc; you know the list, i.e. nothing more than random environmental differences.<p>This discussion reminds me of the threads where folks want make definitive hp statements based on what they feel, i.e. seat dyno #'s...
 

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Re: Castrol Edge Synthetic Oil (S60R1)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>S60R1</b> »</i></TD></TR><TR><TD CLASS="quote">And I do drive nearly the same M-F, same warm-up time, same exact route, not a single different street, same lights, same pedal to the metal schedule, etc., all thanks to rush hour traffic. On the weekends, I drive spirited on the open road, no different from one to the other. My avg gas mileage has always been what I posted in the 1st post for the 2 years I've had the car, going up or down by no more than ~0.5 the most. I don't reset the gas mileage computer, ever, so when you drive as much as I do, even a 2-5min WOT run makes little difference, 0.1-0.2 at most. Not the same with the instant gas mileage meter though, that SOB is all over the map. IIRC the highest I've had it was 99mpg (foot off the gas in 6th gear, slightly downhill) and the lowest something like 4.7mpg (WOT, forget the gear) <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0"><p>I'm not saying it was the oil, or anything else in particular, but my car definately jumped up in gas mileage and is holding it. I'm just wondering why. <br><i>Modified by S60R1 at 11:45 AM 7-22-2009</i></TD></TR></TABLE><p><br>In your own words, if a 2-5min WOT run does not make that much difference, tell me: what kind of mileage increase would you have to experience in order to raise your overall (over many many miles) average? A much larger than 1 mpg difference, maybe? <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0"> And what would give you that if you are doing everything <i>exactly</i>the same?<p>Also, can you be sure that you never reset the mpg computer, even accidentally--or that it reset itself or was reset at the dealer?<p>
 

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Discussion Starter · #18 ·
Re: (badams1897)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>badams1897</b> »</i></TD></TR><TR><TD CLASS="quote">MPG always better when you change your oil at first. Your engine is lubed up the best it possibly can be with brand new oil. That said your MPG will fall off after you drive for a while. We are talking 1mpg which is kind of hard to actually measure successfully . </TD></TR></TABLE><p>Yeah. Weird. It's never jumped up like that before. And we're talking <B>2</B>mpg, not 1 <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/wink.gif" BORDER="0"><p><br><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>MrTippy</b> »</i></TD></TR><TR><TD CLASS="quote">...what kind of mileage increase would you have to experience in order to raise your overall (over many many miles) average? A much larger than 1 mpg difference, maybe? <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0"> And what would give you that if you are doing everything <i>exactly</i>the same?</TD></TR></TABLE><p><br>That's what I'm asking <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/sly.gif" BORDER="0"> (just not in so many words)<p>How did my car, a car whose mpg computer barely nudges from one day to the next, jump 2mpg so suddenly? There's no way...the mpg pc must be fudged. Maybe I'll reset it.<p><br><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>MrTippy</b> »</i></TD></TR><TR><TD CLASS="quote">Also, can you be sure that you never reset the mpg computer, even accidentally--or that it reset itself or was reset at the dealer?</TD></TR></TABLE><p>Yeah, I'm sure of that, because I have reset it before to see what I get highway only, and it always goes to ~26mpg. Once I get into my routine, it goes down to the ~21mpg avg. I did the last oil change myself, car hasn't seen the dealer in months.<p><br><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>MrTippy</b> »</i></TD></TR><TR><TD CLASS="quote"><B>Do a proper analysis</B> over a whole year or more, generate the variances and deviations and you'll see that your observed "difference" is mostly, if not entirely, insignificant. <p>Yes, you may be seeing some increased mileage, but you do not have the data <B>to make any credible statements</B> as to its cause. It could be, and I suspect that it is, due to driving habits, fueling conditions, etc; you know the list, i.e. nothing more than random environmental differences.<p>This discussion reminds me of the threads where folks want make definitive hp statements based on what they feel, i.e. seat dyno #'s...</TD></TR></TABLE><p>I never made any credible or definitive statements, I just asked a question <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/rolleyes.gif" BORDER="0"> <p>Don't be so anal.<p>I don't think the oil did it, I just thought it was an odd coincidence.<BR><BR>
<i>Modified by S60R1 at 4:22 PM 7-22-2009</i>
 

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Re: (S60R1)

I now see that you're an engineer, talking about anality; you should be very familiar determining what's real or not. Anyhow, I apologize if I insulted your sensibilities.
 

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Discussion Starter · #20 ·
Re: (MrTippy)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>MrTippy</b> »</i></TD></TR><TR><TD CLASS="quote">I now see that you're an engineer, talking about anality; you should be very familiar determining what's real or not. Anyhow, I apologize if I insulted your sensibilities. </TD></TR></TABLE><p>lol I'm very anal on the job, drive myself nuts all the time (I hope you know I made that comment in a good mood btw <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/smile.gif" BORDER="0"> , no pun intended).<p>You're right in what you're saying, and I generally agree with you, which is why I made this thread. This is just an observation of mine after I made that oil change, and I'd like to figure it out. Even though I realize 2mpg is insignificant in the grand scheme of things, I've never seen my car go up 2mpg that fast for no apparent reason, it's always been around the same avg. Biggest change I remember before this was ~1mpg with a new air filter, and I don't remember what new plugs gave me at 60k, but IIRC there was an improvement.<p>I decided to drive very spirited on the way home today as a little test, which I just finished doing. When I left work, it was at 22.8mpg. I drove 40 miles, of which ~30 are highway, ~66% in advanced, with plenty of WOT (but not racing anyone) and kept the gears in the mid range of the RPMs, even when behind traffic. Traffic was light because I left late, so I had a nice run. The mpg when I got home was (is) 22.9mpg. It went up <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0"> <p>Ok, I'm dumbfounded <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/confused.gif" BORDER="0"> <p>I realize there is no way I can produce any real scientific proof, or really find out why my car is showing better gas mileage out of the blue. I propose a fun trial for all of you. Try castrol edge for your next cycle, and see if you notice any difference. Report back. This should at least rule out the oil.<p>I suspect the octane booster I used a week before the oil change is the likely cause, as it might have cleaned out some carbon buildup, maybe even the injectors, and helped, along with maybe my regular gas station switching blends late in the season, or maybe just the car's mpg computer getting old. Idk, thinking out loud here.<p>To Needsdecaf: Yeah, my thought exactly ("no"). I did a quick google search for "can oil increase mpg?". Checked out a couple of sites, and according to them, oil can increase mpg by using the right viscosity and some mentioned lubricants, which can reduce friction and thus require less energy. But this is in the order of 1-3%, not the ~8% I'm seeing, plus I didn't change viscosities and even if lubricants made a difference, I have a hard time believing it was that much, especially coming from Mobil 1.<p>I've wasted too much time on this as is, cheers <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/embeer.gif" BORDER="0">
 
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