monya 4 Posted December 12, 2012 Share Posted December 12, 2012 As the Mrs. has mistakenly filled up with BP Super unleaded, are there any advantages/disadvantages, apart from paying more of course. Can I now expect a higher mpg? Quote Link to post Share on other sites
valmiki 23 Posted December 12, 2012 Share Posted December 12, 2012 Hi Monya, this question does crop up every now and then, but I think the consensus was that it doesn't, but that some 'Super' fuels tend to have additional cleaning ingredients which may be beneficial. For what it's worth, I find Energizer Ultra+ batteries in my Prius much more avantageous (long-running joke with mates :groan:) Quote Link to post Share on other sites
johalareewi 271 Posted December 12, 2012 Share Posted December 12, 2012 As the Mrs. has mistakenly filled up with BP Super unleaded, are there any advantages/disadvantages, apart from paying more of course.No.Can I now expect a higher mpg?No. It will probably be lower.See.http://www.toyotaownersclub.com/forums/index.php?showtopic=138257entry1230471and also the follow up...http://www.toyotaownersclub.com/forums/index.php?showtopic=138257&st=20#entry1230815 Quote Link to post Share on other sites
+Steve 2,642 Posted December 12, 2012 Share Posted December 12, 2012 Just has higher octane levels and maybe a cleaning agent.I think Alan nailed it in the last post. Quote Link to post Share on other sites
ian rooke 33 Posted December 13, 2012 Share Posted December 13, 2012 Hi I have used both leaded and super unleaded in my Gen 3 Prius and it improved milage by about 3MPG so was not worthwile, considering the extra cost of super unleaded. Quote Link to post Share on other sites
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