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Anyone else using QS Defy in a Prius? #4471871
07/27/17 10:14 AM
07/27/17 10:14 AM
Joined: May 2006
Posts: 666
N. Calif - State of Jefferson
Greg L Offline OP
Greg L  Offline OP
Joined: May 2006
Posts: 666
N. Calif - State of Jefferson
I recently switched this summer to QS (Quaker State) Defy in 10w30, on our 2007 Prius.

Never has it run so quietly or smoothly...other than maybe the one time I used Mobil 5w30.

In years past, when I was a Subaru owner with Boxer engine, I ran QS once or twice on that motor & really was not a fan of it (became noisy after about 2000 miles with fresh OCI).

My question:
Does anyone else have experience using QS Defy in a Prius? This was the oil on clearance last winter at Autozone, and I am thinking of buying some in 5w30 for next winter.


1951 GMC 1/2 Ton 270ci
2008 Jeep Compass 2.4
2010 Toyota Prius 1.8
2011 Dodge Ram 1500, 5.7 Hemi

Re: Anyone else using QS Defy in a Prius? [Re: Greg L] #4471936
07/27/17 11:32 AM
07/27/17 11:32 AM
Joined: Jun 2016
Posts: 3,566
oil_film_movies Offline
oil_film_movies  Offline
Joined: Jun 2016
Posts: 3,566
You're wise to use Defy, for the reason that it has High Mileage style seal conditioners to keep the polymers flexible on a 10 year old vehicle.
I don't believe there would be any difference in sound coming from the engine.

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