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  • #31
    Originally posted by sj_001 View Post
    Hi All, 1st Post for me, hoping it comes through okay!

    2008 Prado
    V6 Auto
    100K
    265 70 17 Mickey T's

    I thought I would share fuel figures from a recent ~6500KM trip from Sydney to The Daintree over a 3 week period (not really long enough, but that's another story!) towing a 2012 Jayco Swan Outback with 2 Adults and 2 Kids, 2 Ice Boxes, Food Clothes etc.

    I used both 91 Unleaded and 98. The numbers were dramatically different. Some routes below;

    - Cairns to Cape Tribulation towing Van, plus day trip (without van) up Bloomfield to the Lions Den and return to Cape Trib plus some driving around to the local tourist spots then towing back to Cairns after 4 Days - Average Fuel 20 L/100 - UNLEADED 91 (Various Speeds)

    - Cairns to Airlie Beach towing Van - All Bitumen, still approx 20 L/100 - UNLEADED 91 (Speeds generally between 95 and 105)

    - Gympie to Hastings Point - 14 L/100, - UNLEADED 98 (Speeds 90 - 95)

    - Hastings Point to Sydney - 16L 100, - UNLEADED 98 (a few more hills on this run, but still not too bad)

    I was hoping for a low fuel usage with the combo of slower driving and perhaps better roads and 98 Unleaded, but a low of 14 was unexpected.

    Overall, the total trip achieved 17.3 L/100. All in all, I thought 17s aren't too bad, but next time I will be trying to consistently use the 98 if available.

    Cheers
    Interesting I will run the next tank on premium and see if it helps?

    Brett
    2012 Altitude Petrol with Snorkel, Factory Lowline bar, HR Towbar, HID upgrade, Icom 440N UHF and more to come. Check our my travels on [url]http://blog.travelpod.com/travel-blog/dennisozexplore/1/tpod.html[/url]

    Comment


    • #32
      Interesting , there's another 17/100 albeit Diesel v Petrol, I would hesitate a guess that a Swan even with 2 kids extra wouldn't weigh anything like my Lotus.

      I'm going to invest in a Scangaugue next , who knows I might even beg to to tow at 100Kph and not chew nah more diesel!!
      150 Silver Diesel GXL Auto with ECB Bullbar, Toyota Factory towbar, Black Widow Drawer system with Fridge slide and cargo barrier, GME UHF 3340 Radio, Waeco 50 Litre Fridge, Rhino Racks and Rhino Basket, ARB Awning, IPF XS Spotties, ABR Sidewinder Dual Battery system,Airtec Snorkel, Bilstien Shockies, King Springs, Poly Airbags and BFG A/T''s. Now towing a semi offroad Lotus Freelander 18.6 Van, with all the bells and whistles.

      Comment


      • #33
        This is for a Petrol:

        I just did a 8000km trip to the Kimberly towing a camper. I also had a 350mm high rooftop bag and both car and camper where all very loaded up. Ran unleaded 91 the majority of the trip due to availability and averaged 20.5L/100km on 265/70 tyres. So factor that down 5% and it would be around 19.5/100km for the trip. That included a lot of tarmac @ 110kph with a lot of driving against a small headwind, as well as towing on The Gibb River Rd (60-90kph) and various 4x4 tracks without the camper.

        I jacked up the tyre pressure for highway driving and ran 26ish offroad on both car and camper. Into the headwinds I could use up to 23-24L. Slowing down to 90ish would see my figures drop between 2-4L/100.

        I drove a short distance when I got back without the rooftop bag and I think it would have accounted for 2L/100 by itself though maybe it's the smoother roads around Perth having less friction.

        From my usage, I think 17-18 is possible with a petrol if very conservative up hills and overtaking and maintaining around 90Kph which is the sweet spot for towing in S4.
        2012 Prado Altitude v6
        [SIZE=2]ARB BAR | IPF SPOTTIES | BILSTEINS | LOVELLS | POLYAIR | MICKEY THOMPSONS 265/70/R17 | WHISPBAR RACKS | REDARC BCDC | 82AH AUX | ICOM 440N | RFI CDQ5000 | LED LIGHTING | ARB COMPRESSOR | ROADSAFE RECOVERY POINTS | TG150 | AMTS REAR TYRE SPACER AND LIGHT POLE | MAXTRAX | ARB AWNING | OUTBACK CAMPER [/SIZE]

        Comment


        • #34
          A good friend of mine also pointed out that with unleaded, 91 / 95 / 98 is the octane rating. Octane stops pre ignition (pinging) on high compression and doesn't necessarily mean there is a higher energy content to the fuel, although it can too. The ECU in your car will advance the timing over time if you run higher octane fuel however this may take a while to kick in ie several tanks of fuel.

          So generally, running on 91 octane and filling with 98 for one tank will result in no immediate net performance benefit. Always running your car on 98 may give you some extra power due to the auto timing advance on the ECU, but one tank of 91 will drop it back.

          Edit: If you want to test running 98 whilst towing, my suggestion is to run a few tanks of 98 around town first before starting your trip otherwise you may not see much benefit. I figured it wasn't worth it for my trip as I wouldn't be able to get 98 or even 95 everywhere.
          Last edited by MadJak; 30-07-2014, 06:56 PM.
          2012 Prado Altitude v6
          [SIZE=2]ARB BAR | IPF SPOTTIES | BILSTEINS | LOVELLS | POLYAIR | MICKEY THOMPSONS 265/70/R17 | WHISPBAR RACKS | REDARC BCDC | 82AH AUX | ICOM 440N | RFI CDQ5000 | LED LIGHTING | ARB COMPRESSOR | ROADSAFE RECOVERY POINTS | TG150 | AMTS REAR TYRE SPACER AND LIGHT POLE | MAXTRAX | ARB AWNING | OUTBACK CAMPER [/SIZE]

          Comment


          • #35
            Also, not sure if relevant, however I generally run 95 at home, and the 91 was being used in part due to availability but mostly because it's alot more expensive. The 14l/100 I got was from a second fill of 98, I can't recall the fuel consumption on the first tank of 98 after using 91, but it definitely took atleast 1 full tank to notice any major differences.

            The JAYCO is definitely lighter than your lotus, figures are:

            Tare 1332
            Gtm 1490
            ATM 1632

            Cheers

            Comment


            • #36
              Yes, def lighter mine which is 2150 Tare and 2560 ATM (although I can only carry 2500).

              I don't carry much in the van, limited food (mainly what's in the fridge), limited cutlery / crockery and very limited clothes...spares reside in the drawers of the Prado.

              Over the weighbridge, full of water (190 Litres) we came in at 2460......I few bits and pieces get added in (mostly food) as we go along but still under the max allowed.

              I should add (apart from the fuel) its a dream to tow....only struggles on steep hills, and starting from a dead stop on a steep hill.

              Very happy really although was hoping for 15 litres per 100 rather than 17, BUT, not the end of the world.
              150 Silver Diesel GXL Auto with ECB Bullbar, Toyota Factory towbar, Black Widow Drawer system with Fridge slide and cargo barrier, GME UHF 3340 Radio, Waeco 50 Litre Fridge, Rhino Racks and Rhino Basket, ARB Awning, IPF XS Spotties, ABR Sidewinder Dual Battery system,Airtec Snorkel, Bilstien Shockies, King Springs, Poly Airbags and BFG A/T''s. Now towing a semi offroad Lotus Freelander 18.6 Van, with all the bells and whistles.

              Comment


              • #37
                Hi guys
                I am using the diesel to tow a Cub off-road camper trailer. I agree with comments thus far that weight and wind resistance will make a big difference. Generally, I get 12.5 l/100km getting out of the Sydney area with the Blue Mountains in the way. However, west of the Newell Highway when the country flattens out, I can get just under 11 l/100km travelling at 100kmh in S4. Still running OEM tyres

                Cheers
                Mark
                Mark
                150 Series GXL White T/D auto

                Comment


                • #38
                  Originally posted by Snowmann View Post
                  Hi guys
                  I am using the diesel to tow a Cub off-road camper trailer. I agree with comments thus far that weight and wind resistance will make a big difference. Generally, I get 12.5 l/100km getting out of the Sydney area with the Blue Mountains in the way. However, west of the Newell Highway when the country flattens out, I can get just under 11 l/100km travelling at 100kmh in S4. Still running OEM tyres

                  Cheers
                  Mark
                  Yep and probably little to no wind resistance.....on top of my Prado I have Rhino heavy duty racks and basket (needed for my off road adventures), currently I have a space case full of spares and bits and pieces on the roof, as far to the back as I can get it.

                  And naturally having a full size van there's a fair bit of that up and above the Prado, so not surprised you are getting the lower figures snowman.

                  I was just keen to know if anyone out there had a similar set up to me and how they were going.
                  150 Silver Diesel GXL Auto with ECB Bullbar, Toyota Factory towbar, Black Widow Drawer system with Fridge slide and cargo barrier, GME UHF 3340 Radio, Waeco 50 Litre Fridge, Rhino Racks and Rhino Basket, ARB Awning, IPF XS Spotties, ABR Sidewinder Dual Battery system,Airtec Snorkel, Bilstien Shockies, King Springs, Poly Airbags and BFG A/T''s. Now towing a semi offroad Lotus Freelander 18.6 Van, with all the bells and whistles.

                  Comment


                  • #39
                    Originally posted by Mark from Brisbane View Post
                    Yep and probably little to no wind resistance.....on top of my Prado I have Rhino heavy duty racks and basket (needed for my off road adventures), currently I have a space case full of spares and bits and pieces on the roof, as far to the back as I can get it.
                    You would be better off pushing this forward on the roof. From an aerodynamics point of view, a pointy end and a flat rear creates a lot of drag.

                    Comment


                    • #40
                      Originally posted by amts View Post
                      You would be better off pushing this forward on the roof. From an aerodynamics point of view, a pointy end and a flat rear creates a lot of drag.
                      That's interesting as well, I have it there also as its easy to get to, spare items such as electric drill/screws etc which you use a fair bit wen you take a van off road are easily accessible that way BUT if it made a litre per 100 K's difference then that's a fair saving over 13000 of them!!
                      150 Silver Diesel GXL Auto with ECB Bullbar, Toyota Factory towbar, Black Widow Drawer system with Fridge slide and cargo barrier, GME UHF 3340 Radio, Waeco 50 Litre Fridge, Rhino Racks and Rhino Basket, ARB Awning, IPF XS Spotties, ABR Sidewinder Dual Battery system,Airtec Snorkel, Bilstien Shockies, King Springs, Poly Airbags and BFG A/T''s. Now towing a semi offroad Lotus Freelander 18.6 Van, with all the bells and whistles.

                      Comment


                      • #41
                        There's no such thing as economy when towing. There's good consumption, reasonable consumption, crap consumption and let's just blow this place and get home asap consumption. If you want to drive Miss Daisy home with your van in tow then don't speed. Simple. Enjoy your holiday and stop worrying about how much it costs to fill up. Every time I see tourists at the servo jotting down litres and kilometres I think to myself why do you want to keep reminding yourself how much fuel you are burning. I know I'm not as bad as the bloke with the F350 and Lotus Trooper getting 22 - 30l to the 100K.
                        Dave
                        Views expressed are mine alone and are not intended to compromise the integrity of my employer nor offend those who may read such views.
                        Bugger Bali, get out and see Australia before we sell it all to China.

                        Comment


                        • #42
                          I have now started to use only 98 octane from Shell only, when I can.
                          Won't use BP again after a bad dose of diesel in my last car made it run like a real pig until I could refill.
                          Not sure what difference it will make to towing, but I'm picking up my new CUB Camper next week so time will tell.
                          I know from past experience that different premium fuels from different outlets can have a noticeable difference with both power and economy, depending on how you drive of course. My old xr6 turbo loved caltex premium, but no joy with some others.

                          Quote "A good friend of mine also pointed out that with unleaded, 91 / 95 / 98 is the octane rating. Octane stops pre ignition (pinging) on high compression and doesn't necessarily mean there is a higher energy content to the fuel, although it can too. The ECU in your car will advance the timing over time if you run higher octane fuel however this may take a while to kick in ie several tanks of fuel.

                          So generally, running on 91 octane and filling with 98 for one tank will result in no immediate net performance benefit. Always running your car on 98 may give you some extra power due to the auto timing advance on the ECU, but one tank of 91 will drop it back."


                          Not sure why it would take the ecu several tanks to adjust for a higher octane fuel, but only 1 tank to adjust back to low octane...?
                          Doesn't sound right to me...
                          2009 150 GXL V6 Auto. Ironman deluxe bullbar, uniden uhf, ironman awning, roof mounted solar panel, softdog suspension, adjustable upper control arms, lightforce 240 spotlights, 265/70/17 Hancook Dynapro's, Sidewinder dual battery system, Maxtrax, Engel fridge, ARB draw system, Ironman Snorkel, Roadsafe Recovery Points, 80 watt Solar Panel.
                          CUB Supavan Stockman camper.

                          Comment


                          • #43
                            Originally posted by Jaymboze View Post
                            Not sure why it would take the ecu several tanks to adjust for a higher octane fuel, but only 1 tank to adjust back to low octane...?
                            Doesn't sound right to me...
                            This is because the ecu will advance the timing in small increments, but only if it hasn't had a pinging situation in x amount of running time. Every time pinging is sensed the ecu retards the timing. So, with good fuel the ecu may take up to 1000Km before it finds the optimum timing for this fuel, but put a poorer fuel in and it pings, ecu immediately retards timing. Different make vehicles do this in different time frames, not sure on the exact spect for Toyota though.
                            [LEFT]Silver 150 Facelift
                            TJM Bullbar, Lightforce Genisis Spots, Dual Battery System with bits from everyone, Powerful 4x4 slider/steps, Kaymar rear bar, "Genuine" Roof Racks, MSA Seatcovers, Dashmat, Tint, LED Interior Globes, Bridgestone D697s [/LEFT]

                            Comment


                            • #44
                              Awesome...!
                              That means that my next full tank of premium should give 500 hp at the wheels.
                              Looking forward to that...!!!!


                              2009 150 GXL V6 Auto. Ironman deluxe bullbar, uniden uhf, ironman awning, roof mounted solar panel, softdog suspension, adjustable upper control arms, lightforce 240 spotlights, 265/70/17 Hancook Dynapro's, Sidewinder dual battery system, Maxtrax, Engel fridge, ARB draw system, Ironman Snorkel, Roadsafe Recovery Points, 80 watt Solar Panel.
                              CUB Supavan Stockman camper.

                              Comment


                              • #45
                                From memory, with my fuel injected petrol 347 V8 running Bosch (Ford) EFI the ECU will always attempt to maintain a stoichiometric air:fuel ratio of 14.7:1 or thereabouts. So it makes thousands of computations every minute of driving depending on throttle, engine, temp, revs, load, speed, etc. So, by changing the octane rating of the fuel, this will make a small variation to that perfect ratio. It won't take tank-fulls to learn, it is always learning as you drive. Compression plays a big part for sure but the car will run on 91 or 98. It is happier on the good stuff of course. If your engine starts pinging then you have problems.
                                Dave
                                Views expressed are mine alone and are not intended to compromise the integrity of my employer nor offend those who may read such views.
                                Bugger Bali, get out and see Australia before we sell it all to China.

                                Comment

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