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Diesel versus Premium Diesel

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  • #16
    Use BP ultimate in the city and where ever it's available in the bush and do notice a difference in both power and comsumption particularly when towing or loaded up. Using ultimate, the torque converter locks up sooner than the standard dirty diesel which helps too.

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    • #17
      I happened across this site while Googling injector cleaning additives as a result of rough idling and white exhaust smoke after starting my Mazda BT-50 ute on a cold morning after it had been standing for 4 days. For about the last 6000 km over summer and autumn I had been filling up with diesel at my local Caltex servo with no problems. Ampol took over the outlet and I started using their premium diesel and the problem emerged after about 2 tank fills. I filled up again and put a full 375 ml bottle of Penrite Diesel Injector cleaner and after about 1/2 a tank the smoke on start up had been reduced as has the idling. But this may be due to slightly warmer overnight temps or being used daily,
      Ampol say that they use QPBIBA additive in their premium diesel but I couldn't find any info on what the other servos in my town (BP, Shell, Caltex (another one) ) use, so thinking that I had no problems with Caltex I went there to fill up, only to be told that they also supply Ampol!
      So, my conundrum is keep buying Caltex/Ampol premium diesel and keep on with the Penrite additive, or try another brand of fuel and/or additive?
      I would welcome any thoughts from the forum.

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      • #18
        We use BP ultimate in our diesel cars religiously. Mate who has a fleet of vehicles for work has had a lot of fuel testing done, and BP ultimate always had the higher cetane rating, and best anti foam agents. Takes a few tanks before you see differences we found.

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        • #19
          Originally posted by 470rigby View Post
          Ampol say that they use QPBIBA additive in their premium diesel but I couldn't find any info on what the other servos in my town (BP, Shell, Caltex (another one) ) use, so thinking that I had no problems with Caltex I went there to fill up, only to be told that they also supply Ampol!
          So, my conundrum is keep buying Caltex/Ampol premium diesel and keep on with the Penrite additive, or try another brand of fuel and/or additive?
          I would welcome any thoughts from the forum.
          The former "Caltex" merged with Ampol in 1995. The owner of the Caltex brand name (Chevron) pulled the pin on AMPOL using the Caltex name in 2019. If you're still buying fuel from a Caltex station, tell the owners that they should have changed their signs by now! Ampol fuel is Caltex fuel.

          I could be wrong but I understand that a large proportion of Australia's fuel is refined overseas now. Australia's largest refinery (Kwinana WA) closed down recently, leaving only two smaller refineries on the east coast. WA's fuel now comes from Singapore.

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          • #20
            The federal government has a set of minimum standards for all transport fuels sold in Australia. Diesel must have a minimum cetane number of 46 & contain a minimum of 10% sulfur. It can also contain up to 5% biodiesel. There are also many other specifications.
            If you search a fuel company site you can usually find the specs for their fuels. All diesels have much the same specs, the "Premium" diesels just have some extra additives - cleaning agents (detergent), rust inhibitor & anti foam agent. These are really little more than marketing hype.

            It's really debatable whether these really make a difference or not. I've tried several different brands of diesel (even Truck Diesel) & haven't found any one better than another & the car doesn't drive any differently. It's all a matter of perception.
            I've also heard (but not confirmed) that the Caltex brand is going to return to Australia. In Qld the currently Puma branded servos will be converted to Caltex some time in the future.
            [COLOR=#b22222]Prado 150 2.8 GX Auto - ARB Bull Bar, Towbar, Dual Batteries, UHF, 2" lift with King Springs & Bilsteins[/COLOR]

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            • #21
              The federal government has a set of minimum standards for all transport fuels sold in Australia. Diesel must have a minimum cetane number of 46 & contain a minimum of 10% sulfur. It can also contain up to 5% biodiesel. There are also many other specifications.
              If you search a fuel company site you can usually find the specs for their fuels. All diesels have much the same specs, the "Premium" diesels just have some extra additives - cleaning agents (detergent), rust inhibitor & anti foam agent. These are really little more than marketing hype.

              It's really debatable whether these really make a difference or not. I've tried several different brands of diesel (even Truck Diesel) & haven't found any one better than another & the car doesn't drive any differently. It's all a matter of perception.
              I've also heard (but not confirmed) that the Caltex brand is going to return to Australia. In Qld the currently Puma branded servos will be converted to Caltex some time in the future.
              [COLOR=#b22222]Prado 150 2.8 GX Auto - ARB Bull Bar, Towbar, Dual Batteries, UHF, 2" lift with King Springs & Bilsteins[/COLOR]

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              • #22
                Apologies for the multiple replies, the site has been doing some weird things while I typed the reply
                [COLOR=#b22222]Prado 150 2.8 GX Auto - ARB Bull Bar, Towbar, Dual Batteries, UHF, 2" lift with King Springs & Bilsteins[/COLOR]

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                • #23
                  I may have posted this on this forum before.
                  A close relative works at a major fuel terminal. He says regularly that all the fuel that comes in from various sources, ie Ampol refinery and ships, goes into one big tank. The fuel tankers from the various companies that come to get loaded with fuel, add the particular "brand" additive to their respective tanker load. In other words, don't be fooled by the marketing hype.
                  2019 Prado GXL 2.8L Diesel
                  2022 Jimny too

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