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Oil for 1985 Nissan Pickup. Is high ZDDP required? #5135099
06/15/19 05:08 PM
06/15/19 05:08 PM
Joined: Feb 2016
Posts: 10
CA
Hal9000 Offline OP
Hal9000  Offline OP

Joined: Feb 2016
Posts: 10
CA
Getting read to change oil on a 1985 Nissan Pickup (2.4, automatic) with 99K miles. I have some conventional Pennzoil High Mileage 10w-30 that has been sitting in the garage for around 3 years or so. I was going to use that and a Fram Tough Guard (what Walmart had).

Googling around the internet I see some people saying that an older flat tappet engine like this should have an oil higher in ZDDP. And, there's no better place on the internet than here to ask an oil-related questions. smile

Is the Pennzoil High Mileage 10w-30 fine? I definitely want to keep the truck for many years, so if it's not I'd certainly be willing to go buy something else.

And, out of curiosity, oil sitting for 3 years in a bottle should still be good, right?

Thanks.

Last edited by Hal9000; 06/15/19 05:11 PM.
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135102
06/15/19 05:11 PM
06/15/19 05:11 PM
Joined: Oct 2009
Posts: 4,910
Wet side WA
JohnnyJohnson Offline
JohnnyJohnson  Offline

Joined: Oct 2009
Posts: 4,910
Wet side WA
LOL its an 85 any oil you run will be better than it had in 1985.


2004 Corolla 134004
Out: EDGE EP 5W-30 Bosch 3311 7156 Miles
In: Havoline Pro DS 10w-30 Purolator PureOne 3-14-19 129693
2006 Duramax 75175
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73705 4-22-18
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135105
06/15/19 05:15 PM
06/15/19 05:15 PM
Joined: Apr 2018
Posts: 477
US
talest Offline
talest  Offline

Joined: Apr 2018
Posts: 477
US
KA24E.

Use that three year old oil on that 34 year old Datsun/Nissan and enjoy it.

Back To The Future truck was a Toyota 4x4. Similar but different look than yours.

Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135106
06/15/19 05:17 PM
06/15/19 05:17 PM
Joined: Feb 2003
Posts: 8,535
Jupiter, Florida
Cujet Offline
Cujet  Offline

Joined: Feb 2003
Posts: 8,535
Jupiter, Florida
I'm sure that oil is fine. I think that engine is a SOHC and therefore not really a flat tappet design. I owned one back then and going by memory about the SOHC thing.

By the way, mine lasted a very long time and the subsequent owner had a couple hundred thousand miles on it.

But like all engines with a timing chain, it's good to use a quality oil and change it frequently.

Last edited by Cujet; 06/15/19 05:19 PM.

People who count on their fingers should maintain a discreet silence.
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135111
06/15/19 05:29 PM
06/15/19 05:29 PM
Joined: Jul 2005
Posts: 11,767
Maricopa Arizona
dave1251 Online happy
dave1251  Online Happy

Joined: Jul 2005
Posts: 11,767
Maricopa Arizona
Pennzoil HM is a good fit for your truck enjoy!


make the inside of your engine oil cap white.
don't use.
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135175
06/15/19 07:12 PM
06/15/19 07:12 PM
Joined: Mar 2004
Posts: 1,775
Flaherty, KY
92saturnsl2 Offline
92saturnsl2  Offline

Joined: Mar 2004
Posts: 1,775
Flaherty, KY
Nissan pickup engines were all OHC, so no flat tappet concerns with these engines.


1985 F-250HD 7.5L 4x4 135k- Castrol GTX 15w-40
04 Odyssey EX 190k Valv. Durablend 5w-30
96 Maxima GLE 265k Chevron Delo LE 5w-40
07 Chrysler Pacifica Limited 4.0L 140k Belgian Castrol Edge 0w-30 Euro
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: 92saturnsl2] #5135233
06/15/19 08:30 PM
06/15/19 08:30 PM
Joined: May 2009
Posts: 5,507
Canada
expat Offline
expat  Offline

Joined: May 2009
Posts: 5,507
Canada
Originally Posted by 92saturnsl2
Nissan pickup engines were all OHC, so no flat tappet concerns with these engines.



So maybe not flat tappet, but if a flat rocker acts on a cam, is that not the same thing?

Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135246
06/15/19 08:41 PM
06/15/19 08:41 PM
Joined: Dec 2010
Posts: 4,428
Los Angeles, California
Gokhan Offline
Gokhan  Offline

Joined: Dec 2010
Posts: 4,428
Los Angeles, California
Originally Posted by Hal9000
Getting read to change oil on a 1985 Nissan Pickup (2.4, automatic) with 99K miles. I have some conventional Pennzoil High Mileage 10w-30 that has been sitting in the garage for around 3 years or so. I was going to use that and a Fram Tough Guard (what Walmart had).

Googling around the internet I see some people saying that an older flat tappet engine like this should have an oil higher in ZDDP. And, there's no better place on the internet than here to ask an oil-related questions. smile

Is the Pennzoil High Mileage 10w-30 fine? I definitely want to keep the truck for many years, so if it's not I'd certainly be willing to go buy something else.

And, out of curiosity, oil sitting for 3 years in a bottle should still be good, right?

Thanks.

No, you do not need higher ZDDP for flat tappets with today's modern oils.

However, you do need a thicker base oil for flat tappets. The viscosity your valvetrain experiences is the base-oil viscosity at the given oil temperature because of the ultrahigh shear rates in the valvetrain, not the kinematic or HTHS viscosities. A 15W-40 HDEO is by far the best choice, especially in your climate. The base oil will not get much thicker than that.

10W-30, especially a high-mileage one or an HDEO 10W-30 is OK if your climate does not allow a 15W-40. There is no HTHS viscosity data on Pennzoil HM 10W-30 but it's probably around 3.4 cP and the base oil should be moderately thick as well, although not nearly as thick as that of a 15W-40.

Avoid 5W-30, as the base oil will be too thin for flat tappets. Valvoline Advanced Synthetic 5W-30 could be an exception.

Oils have at least five or more years of shelf life. Shake the bottle before use.

If anyone asks the flat-tappet question again, the answer is any modern 15W-40 HDEO and the ZDDP level does not matter.

There is also Amsoil ACD 10W-30/SAE 30, which is perfect for flat tappets, as it has a very thick base oil because it is a monograde, but it's expensive.


1985 Toyota Corolla LE, 4A-LC engine, ~ 276,000 M
Mobil 1 Extended Performance 0W-20 SN PLUS (PAO-and-AN-based)
Fram Ultra XG3600 filter (full synthetic), 90430-12031 drain gasket (rubber on aluminum)
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: dave1251] #5135293
06/15/19 09:19 PM
06/15/19 09:19 PM
Joined: Mar 2015
Posts: 6,436
Virginia
bbhero Offline
bbhero  Offline

Joined: Mar 2015
Posts: 6,436
Virginia
Originally Posted by dave1251
Pennzoil HM is a good fit for your truck enjoy!



I agree with dave1251... Pennzoil HM.


Nissan Altima 3.5 Coupe
Carquest High mileage full synthetic 5w30
CQ blue 84356 Oil filter
"Treat your family like your friends and treat your friends like your family."
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135399
06/16/19 01:33 AM
06/16/19 01:33 AM
Joined: Oct 2015
Posts: 3,084
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline

Joined: Oct 2015
Posts: 3,084
Balearic Islands , Spain
SOHC doesn't mean it's not flat tappet.... i haveppen to have a SOHC flat tappet engine in my Escort.

The camshaft is in the head, and the hydraulic flat tappet lifters ride on the cam, which push up directly on the rocker.

Last edited by FordCapriDriver; 06/16/19 01:34 AM.

1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.
1988 Ford Escort XR3i Cabrio, - Shell Rimula R4X 15W-40
G40 Si-OAT coolant in both


Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Cujet] #5135402
06/16/19 01:35 AM
06/16/19 01:35 AM
Joined: Oct 2015
Posts: 3,084
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline

Joined: Oct 2015
Posts: 3,084
Balearic Islands , Spain
Originally Posted by Cujet
I'm sure that oil is fine. I think that engine is a SOHC and therefore not really a flat tappet design. I owned one back then and going by memory about the SOHC thing.

By the way, mine lasted a very long time and the subsequent owner had a couple hundred thousand miles on it.

But like all engines with a timing chain, it's good to use a quality oil and change it frequently.


There are various designs of SOHC valvetrains, some do actually have lifters like the ones you would find in a pushrod engine.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.
1988 Ford Escort XR3i Cabrio, - Shell Rimula R4X 15W-40
G40 Si-OAT coolant in both


Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135453
06/16/19 06:18 AM
06/16/19 06:18 AM
Joined: Dec 2016
Posts: 9,119
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 9,119
Waco, TX
Originally Posted by Hal9000

And, out of curiosity, oil sitting for 3 years in a bottle should still be good, right?


Yes, I still have oil in the bottle left over from the 1990's - it's perfectly fine and never goes bad if stored properly.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135506
06/16/19 08:07 AM
06/16/19 08:07 AM
Joined: May 2009
Posts: 13,074
N.H, U.S.A.
ARCOgraphite Offline
ARCOgraphite  Offline

Joined: May 2009
Posts: 13,074
N.H, U.S.A.
KA24E - that's the head and cam used for seq. IVA valvetrain wear tests.

It's like a Honda Civic SOHC design without the VTEC.

Remember too High ZDDP = Cam and follower wear.


2019 VW Jetta S 6MT OCI#0 5033mi-Castrol Edge Prof? VW508+OE Filter; '17 Subaru Crosstrek CVT OC#7 52665mi-Castrol GTX Magnatec 5W20 + SOA Filter
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135639
06/16/19 11:08 AM
06/16/19 11:08 AM
Joined: Feb 2016
Posts: 10
CA
Hal9000 Offline OP
Hal9000  Offline OP

Joined: Feb 2016
Posts: 10
CA
Thank you for all the responses thus far. Here are a few pics of the vehicle.

She's an ideal runabout/Home Depot vehicle. These older trucks that are low to the ground are so easy to load/unload. It's also extremely easy to park, and has power steering even. Now, obviously it's not going to pull a huge trailer or boat, and with the three speed automatic it isn't going to win the Cannonball Run. It's the 'Sport Truck' trim level, which I presume got you bucket seats in blue plaid and a snazzy ST decal. However, it apparently didn't include AC.

[Linked Image]

[Linked Image]


Last edited by Hal9000; 06/16/19 11:12 AM.
Re: Oil for 1985 Nissan Pickup. Is high ZDDP required? [Re: Hal9000] #5135643
06/16/19 11:12 AM
06/16/19 11:12 AM
Joined: Mar 2017
Posts: 10,005
...
PimTac Offline
PimTac  Offline

Joined: Mar 2017
Posts: 10,005
...
Does this truck have the engine with two spark plugs per cylinder?

I almost bought a Datsun 4x4 with that motor. Really nice truck. I wish I had.


2017 Mazda CX5
Havoline Pro DS 0w20
Roki OEM filter.
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