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Anyone else using QS Defy in a Prius? #4471871
07/27/17 11:14 AM
07/27/17 11:14 AM
Joined: May 2006
Posts: 658
N. Calif - State of Jefferson
Greg L Offline OP
Greg L  Offline OP
Joined: May 2006
Posts: 658
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
1996 GMC Sierra 5.7
2002 Dodge Ram 1500 4.7
2008 Jeep Compass 2.4
2010 Toyota Prius 1.8

Re: Anyone else using QS Defy in a Prius? [Re: Greg L] #4471936
07/27/17 12:32 PM
07/27/17 12:32 PM
Joined: Jun 2016
Posts: 2,967
oil_film_movies Online content
oil_film_movies  Online Content
Joined: Jun 2016
Posts: 2,967
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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