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Using up my QS Defy 10W-30 "SL" oil #4439228
06/23/17 08:17 AM
06/23/17 08:17 AM
Joined: Jan 2003
Posts: 1,532
Shippensburg, PA
novadude Offline OP
novadude  Offline OP

Joined: Jan 2003
Posts: 1,532
Shippensburg, PA
I have 3 qts of the old QS Defy 10W-30 with high ZDDP left over. Need five qts for an oil change. Since SL Defy is no longer available, which oil would you choose to mix with the 3 qts of Defy? Does anyone know if the SN additive package in "new" defy is the same with reduced ZDDP? If so, I guess this would be the obvious choice.

Re: Using up my QS Defy 10W-30 "SL" oil [Re: novadude] #4439243
06/23/17 08:42 AM
06/23/17 08:42 AM
Joined: May 2009
Posts: 12,457
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline

Joined: May 2009
Posts: 12,457
N.H, U.S.A.
Last Fall just used my last old stash Quart of Defy with Slick 50 (10w30) in the Tecumseh Snowblower.

One of the best oils I ever used.

I would just mix it with some Formula Shell or QSGB.

Zinc gets used up under high stress, so the Defy SL its just starting 50% higher treat rate than current. When you run the oil hard you will use up that zdp. Its still shows in a UOA but its used and converted.

You may also use Castrol Motorcyle 4T "Dino" which will have more zinc than defy. That is AP SH rated due to high Phosphorous from the ZDP treat rate.


2019 VW Jetta S,6M OCI#0 1136mi-Castrol Edge Prof? VW508+OE Filter; '17 Subaru Crosstrek CVT OC#6 43467mi-Valvoline Adv 0w20 + SOA Filter
Re: Using up my QS Defy 10W-30 "SL" oil [Re: novadude] #4439267
06/23/17 09:17 AM
06/23/17 09:17 AM
Joined: Sep 2015
Posts: 4,111
Connecticut
69GTX Offline
69GTX  Offline

Joined: Sep 2015
Posts: 4,111
Connecticut
I had 5 qts of the SL Defy last year and used them up 1-2 quarts at a time in a mixture of PP/QSUD oils. I would imagine the new SN version has much less Phos/Zinc. If you want to maintain that higher phos/zinc there ought to be a 10w/30 or 10w/40 Pennzoil High Mileage oil with strong Zn levels you can mix.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Using up my QS Defy 10W-30 "SL" oil [Re: novadude] #4439318
06/23/17 10:11 AM
06/23/17 10:11 AM
Joined: Oct 2005
Posts: 7,094
Colorado
Kuato Offline
Kuato  Offline

Joined: Oct 2005
Posts: 7,094
Colorado
Just buy 2 quarts of the newer QS to match up the additive packages. Done!


Thick vs Thin test: 15k / 43k miles complete
Re: Using up my QS Defy 10W-30 "SL" oil [Re: novadude] #4439418
06/23/17 12:17 PM
06/23/17 12:17 PM
Joined: Jul 2013
Posts: 2,419
OBX & Central FL
NormanBuntz Offline
NormanBuntz  Offline

Joined: Jul 2013
Posts: 2,419
OBX & Central FL
QS has changed the name from Defy to High Mileage. It's $16-17 a jug at Walmart. I'm currently using it in the wife's Infiniti. Some Walmarts may carry the individual quarts. If the QS High Mileage is not available, I'd use the Pennzoil High Mileage to go with your leftover quarts.


2017 Honda Odyssey SE, 18K
2013 Honda Accord LX, 59K
2007 Honda Ridgeline RTS, 89K
2007 Infiniti M35, 107K
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