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MPG shot way up after oil change...

Discussion in 'Gen 3 Prius Fuel Economy' started by Jeffrimerman, Jul 7, 2016.

  1. Jeffrimerman

    Jeffrimerman Member

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    I was about to look for a set of stock rims with tires since I have some tires on it that I don't think are LRR. I was getting 46 mpg which didn't make sense so I google my tires and they are just regular economy tires. Later I got the idea maybe the oil isn't right after reading an article and so I put some Mobil 1 0-20w and sure enough the next day I'm at 54 mpg. Geez, why do people do that. I bet they had regular non synthetic 10-40 or something. So now I wonder if I did get LRR tires would it make much difference.
     
    #1 Jeffrimerman, Jul 7, 2016
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  2. bwilson4web

    bwilson4web BMW i3 and Model 3

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    There are so many simple and painless tweaks to get agreat MPG. There is a questionnaire that is a good first step. I don't have a link to it but certainly a good first step. We can chat about Bob's tricks another day. <GRINS>

    Bob Wilson
     
    #2 bwilson4web, Jul 8, 2016
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  3. Peeto

    Peeto Member

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    Yes, toyota get some serious testing on this and right oil can improve your mpg. From what I saw, it was the price of the added cost of this oil regular to standard ones /do not remember number/. Added cost was app 40 EUR and also expected savings was app 40 EUR on fuel within 1 year.
     
    #3 Peeto, Jul 10, 2016
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  4. Jeffrimerman

    Jeffrimerman Member

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    The store I went to regular Castrol oil was $15 and Mobil 1 was $22 so only $7 difference which is about 4 EUR. That should pay me back in about 2 tank fill ups with 7 mpg per gallon increase. The oil shouldn't have made that much of a difference but I bet the previous owner was dumb and put 20-50w oil. I should have changed the oil immediately but it was super clean. Then it dawned on me that I have no idea what oil that is.
     
    #4 Jeffrimerman, Jul 10, 2016
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  5. Peeto

    Peeto Member

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    Yes, it is too much gain for oil change :) I payed 80eur for oil change, but toyota dealer offers me both standard with much lower price or this one for better mpg. With their more than 100% margin, I believe that oil will not cost more than 20:))
    edit- I just found invoice, they give me toyota oil 0W-20 4.2l - 80.6eur - so hoping they did not ripp me off :)
     
    #5 Peeto, Jul 10, 2016
    Last edited: Jul 10, 2016
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    Ouch! Here I buy Toyota 0W20 in bulk from local dealership for $4.50 (Canadian) per liter, or individual 1 liter bottles for $5.91. At current exchange rates, 4.2 liters (of bulk) would cost me 13.12 Euros, over four times more for you. :confused:
     
    #6 Mendel Leisk, Jul 10, 2016
    Last edited: Jul 10, 2016
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  7. Peeto

    Peeto Member

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    Yes :) .. I already found good toyota service guy/he changed me rear breaks and does not want even 20 from me/ and I will not use original toyota service for such a things ;). But you know, after I bought used Prius, I let the official toyota dealer made full service at least once.
     
    #7 Peeto, Jul 10, 2016
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  8. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    One frequent 'mileage killer' is overfilling the oil. An oil change may have brought the oil level down to where it was not slowing the crankshaft.
     
    #8 JimboPalmer, Jul 10, 2016
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