New old stock Pennzoil 10w40 with Z-7

[cwilliamsws6]

Someone on my local buy/sell/trade group has 12 unopened quarts of Pennzoil 10w40 with Z-7. It is API SH. Does anyone here know if that vintage of Pennzoil was paraffin based or not? I'd like to know before I buy. Thanks.

 

[tasch72]

API SH has been obsolete since 1996, the juice may not be worth the squeeze either way

 

[cwilliamsws6]

API SH has been obsolete since 1996, the juice may not be worth the squeeze either way

I know it's obsolete, I just wanted to have it on hand for the mowers and for top offs. I was just curious if this Pennzoil was paraffin based or not.

 

[blufeb95]

What do you mean by "paraffin based," almost all motor oil is "paraffin based" , the more refined a mineral oil is the more paraffinic compounds it contains, PAO is almost entirely parrafinic.

 

[cwilliamsws6]

What do you mean by "paraffin based," almost all motor oil is "paraffin based" , the more refined a mineral oil is the more paraffinic compounds it contains, PAO is almost entirely parrafinic.

Sorry. What I meant is, is this the Pennzoil that was known to cause waxy buildup in engines back in the day?

 

[71Chevyguy]

Nothing special about that oil, but it wouldn't hurt anything to use it unless it is going into something brand new. I have plenty of oil on my shelf that is at least 20 years old and use it in all of my cars including the 2010, all is well.

 

[71Chevyguy]

Sorry. What I meant is, is this the Pennzoil that was known to cause waxy buildup in engines back in the day?

I think that issue goes back way further than 1996 unless I am mistaken.

 

[bullwinkle]

Thought that wax buildup issue was way back, like straight grade Grp. I Quaker State? I'm sure the SH Pennzoil would be fine, for the right price. Should be good flat tappet oil, maybe not so good in an oil burner w/catalytic converter.

 

[jeepman3071]

I think that issue goes back way further than 1996 unless I am mistaken.

Yeah I believe that was 1960s-1970s. This oil would be fine for mowers, top offs, etc. I wouldn't pay much for it though.

 

[JavierH19]

id pay a buck a quart for it. its old stuff.

 

[Passport1]

If the raw petroleum extracted from the bowels of the earth is a billion years old, what difference does a paltry 10-15 years make?

 

[Oliveoil2]

I’d love to see a UOA with this oil.

 

[cwilliamsws6]

I’d love to see a UOA with this oil.

That would be interesting to see. I'll try and buy some of it.

 

[CleanSump]

I used the 10W-40 in a 69 Lemans I had as a teenager circa 1975 -80.
I think the Z was from PennZoil and the 7 was marketing 7 supposed advantages like the detergent, breakdown resistance etc.

 

[manicrodder]

Someone on my local buy/sell/trade group has 12 unopened quarts of Pennzoil 10w40 with Z-7. It is API SH. Does anyone here know if that vintage of Pennzoil was paraffin based or not? I'd like to know before I buy. Thanks.

This is the oil I used in my new 77 power wagon through the 80's in everything else. Parafffinic does not refer to a wax base. They were superior to the napthenic oils of the time. I never had problems.

 

[GMBoy]

Unless you want to buy it for nostalgia I would pass. None of my motors (including lawn equipment) is worth old oil and outdated specifications. The few dollars saved isn't worth it....