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QS HM oil info #4598759
12/09/17 08:42 AM
12/09/17 08:42 AM
Joined: Jun 2005
Posts: 118
Wichita, Kansas
vwalburn Offline OP
vwalburn  Offline OP

Joined: Jun 2005
Posts: 118
Wichita, Kansas
I see that Quaker State says that their HM oils have a boosted zinc package for more protection. Does anyone have any idea what they "boost" their zinc level to?


1996 Dodge Ram 1500
Valvoline MaxLife
2002 Honda Accord
Valvoline SynPower
2011 Chevrolet Equinox
Mobil1
1964 Pontiac GTO
Pennzoil 10W-40
Re: QS HM oil info [Re: vwalburn] #4598764
12/09/17 08:47 AM
12/09/17 08:47 AM
Joined: Apr 2012
Posts: 10,506
Kendall, FL
wemay Offline
wemay  Offline

Joined: Apr 2012
Posts: 10,506
Kendall, FL
I haven't seen a VOA for the newer formulation but when it was Quaker State Defy...



18 KIA Sportage 2.4 AWD
M1HM 10W30, OEM
ST SYN 5W30, ST9688 (next)

13 Hyundai Santa Fe Sport 2.0T
PPeL 5W30, OEM
M1HM 10W30, OEM (next)
Re: QS HM oil info [Re: wemay] #4598798
12/09/17 09:32 AM
12/09/17 09:32 AM
Joined: Jun 2005
Posts: 118
Wichita, Kansas
vwalburn Offline OP
vwalburn  Offline OP

Joined: Jun 2005
Posts: 118
Wichita, Kansas
I'm sure it's lower now than that SL-rated oil. Just wondering how high can an oil go with an SN rating.


1996 Dodge Ram 1500
Valvoline MaxLife
2002 Honda Accord
Valvoline SynPower
2011 Chevrolet Equinox
Mobil1
1964 Pontiac GTO
Pennzoil 10W-40
Re: QS HM oil info [Re: vwalburn] #4598881
12/09/17 11:22 AM
12/09/17 11:22 AM
Joined: Apr 2017
Posts: 118
Michigan
Building3 Offline
Building3  Offline

Joined: Apr 2017
Posts: 118
Michigan
I had the same question so I called the Shell tech phone line. The fellow said that Defy used to have the boosted zinc level but no more. It is lowered to be consistent with the SN rating. Of all of the Quaker State/Pennzoil/Shell motor oils they sell, he recommended Rotella T4 for flat tappet engines. It has 1100 ppm of Zinc. If you are looking for conventional motor oils, there are the specialty oils like Joe Gibbs, Brad Penn, etc., and diesel truck oils like Rotella and others. If you are looking for synthetics, then Mobil 1 has several. The 15w-50 specifically says it is for flat tappets. The 0w-40 and the 5w-50 also have over 1000 ppm of zinc. Castrol Edge 5w-50 states it is for classic cars and older vehicles. So there are plenty of choices, but what was good in the past may not be in the future so it's always good to check.

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