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  1. #1

    Default 09 Yukon- synth or conventional from factory?

    Hi all, I have a question about my new 09 Yukon (love it).

    I have to top off the motor oil and I'm not yet to my first oil change. I was wondering if the Yukons roll out of the factory with conventional or synthetic oil? I am assuming I have to use the same kind and I can't mix, right?

    Let em know, thanks!

  2. #2


    not much help on answering your question, but why do you need to top off the oil on a brand new yukon before your first oil change. I would think conventional but don't take my word for it.
    2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

  3. #3


    A buddy of mine bought an '09 Sierra a few months back and all the fluids were synthetic...but the big issue would be why are you having to top off the oil in a new truck?

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