Just put a 5W-40 Mobil 1 TDT oil in...

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by alekska, Jun 23, 2015.

  1. alekska

    alekska Active Member

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    For my last oil change at ~ 165000 miles I decided to try something new (have been using M1 5W-30 previously all the time) to quiet down the rickety-clackety valves. In the Wallyworld I saw 4-quart 5W-40 Turbo Diesel Truck oil that also has gasoline SM, SL, SN rating.... for $26 and decided to try it.

    So far the engine is noticeably quieter, and I notice no significant effects on gas mileage. The engine response to a pressed gas pedal seem better too, but that's definitely within the error margin of my butt-o-meter :)

    I plan to have it in for 5000 to 8000 miles. Will report if engine dies suddenly :)

    P.S. I never had oil consumption between changes... for a car that burns oil, using something like this Mobil1 TDT would not be a best choice as this oil has lots of additives - if burned may affect catalytic converter

    - Alex
     
    #1 alekska, Jun 23, 2015
    Last edited: Jun 23, 2015
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  2. bisco

    bisco cookie crumbler

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    nice! should be interesting to see what your mpg's do as well.
     
    #2 bisco, Jun 23, 2015
  3. alekska

    alekska Active Member

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    I have a lot of very short trips in bad Atlanta traffic + AC use... so I usually get ~43 mpg. That looks pretty much unchanged. Yesterday on a longer interstate tun at ~ 65 mph I got 54 mpg. Good enough for me :)

    - Alex
     
    #3 alekska, Jun 23, 2015
  4. Aaron Vitolins

    Aaron Vitolins Senior Member

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    Thanks for the info. I'll have to try it on my 255,700 mile Prius :)
     
    #4 Aaron Vitolins, Jun 23, 2015
  5. uart

    uart Senior Member

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    Very unlikely to cause any problems in my opinion. :)

    BTW. What brand oil was it? It sounds like it might be "Rotella T6" or similar.
     
    #5 uart, Jun 24, 2015
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    I think, off-and-on, about trying a higher viscosity oil, say 5W-20, putting it in the spring, see how it does, change it out for 0W-20 (spec'd oil for third gen), in the fall.

    I see TDT stands for Turbo Diesel Truck. I'd pass on that, but for an older, highish mileage vehicle, might be worth a try.
     
    #6 Mendel Leisk, Jun 24, 2015
    Last edited: Jun 24, 2015
  7. alekska

    alekska Active Member

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    Mobil 1 Full synthetic Turbo Diesel Truck 5W-40 :)

    - Alex
     
    #7 alekska, Jun 24, 2015
  8. alekska

    alekska Active Member

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    5W-20 will be only different from 0W-20 at VERY cold temperatures

    - Alex
     
    #8 alekska, Jun 24, 2015
  9. Cadenza

    Cadenza Member

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    The viscosity is higher, that's why your engine is quieter. Additives like Phosphorus and Zinc are much higher too, which gives better metal-to-metal protection but not good for the CAT... if the engine currently burns oil.
     
    #9 Cadenza, Jun 26, 2015
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