Can I Use It or Loose It?

[ridgerunner]

I have a case of Quaker State 10W40 in plastic bottles dated 1989. Do you think it will hurt if I use it in my 1990 F-150 w/300 6 engine? I hate to waste it on chainsaw bar lube. How about in a new Husky lawn mower that takes 30 weight? I know, shake the bottle first! What do ya'll think??

 

[rat]

I think you will be fine using it. You can put sawdust in the crankcase of those engines and they will still run.

 

[daman]

That 300 strait 6 would love that oil,it'll run forever on cooking oil! i'd use it...shake the h ell out oof it first.

 

[StevieC]

Originally Posted By: daman
That 300 strait 6 would love that oil,it'll run forever on cooking oil! i'd use it...shake the h ell out oof it first.
+1

 

[addyguy]

Yeah, go for it - that's what the engine was run on when it was first built! (1990 oils...)

 

[demarpaint]

Originally Posted By: ridgerunner
I have a case of Quaker State 10W40 in plastic bottles dated 1989. Do you think it will hurt if I use it in my 1990 F-150 w/300 6 engine? I hate to waste it on chainsaw bar lube. How about in a new Husky lawn mower that takes 30 weight? I know, shake the bottle first! What do ya'll think??


Shake it up and use it. The 300 I6 is probably one of the most reliable and best engines Ford made, I love them. If you are afraid use 4 qts of some fresh SM oil, and 2 qts of the older oil, or even a 50/50 mix. What ever you decide to do there won't be any problems.

 

[ridgerunner]

Thanks guys, consider it done!

 

[pbm]

I have no problem using older oil but remember that 10W40 from
1989 was known to have less than stellar VII's. I'd use it mixed with current oil or straight weight or for a very short OCI.

 

[Cutehumor]

mix it with SM oil if your worried.

 

[daves87rs]

Use it....

 

[zrxkawboy]

Like others said, I'd mix it 50/50 with SM oil.

 

[jorton]

Originally Posted By: pbm
I have no problem using older oil but remember that 10W40 from 1989 was known to have less than stellar VII's. I'd use it mixed with current oil or straight weight or for a very short OCI.


Owners manual from my 1990 Dodge Dynasty stated "Do not use 10w-40 grade." Personally, I'd use 1 bottle per oc just to get rid of it.

 

[ridgerunner]

I get most of the terms used here but some I'm not sure about. Again for the not so informed, what is SJ, SM and VIII's?? Thanks

 

[ThirdeYe]

SJ and SM are API specifications. VII's are Viscosity Index Improvers.

 

[ridgerunner]

Originally Posted By: ThirdeYe
SJ and SM are API specifications. VII's are Viscosity Index Improvers.


OK. Go on...

 

[ThirdeYe]

Here is a link explaining as to how the API specifications work:
http://www.aa1car.com/library/api_motor_oil_classifications.htm

Viscosity modifiers (improvers) are polymeric molecules that are sensitive to temperature. At low temperatures, the molecule chain contracts and does not impact the fluid viscosity. At high temperatures, the chain relaxes and an increase in viscosity occurs.
http://www.machinerylubrication.com/article_detail.asp?articleid=1327

 

[ridgerunner]

Thanks.

 

[pbm]

Remember that 10w40 uses more VII's than 10w30 to achieve the greater viscosity spread. The VII's from that era (1989) were known to break down causing ring sticking and other problems. I would use it a quart or 2 at a time mixed with SM oil.

 

[ridgerunner]

OK, I've got a couple pints of Sheaffers moly 132 laying around. Would it help this old oil out?

 

[qship1996]

Pour that old outdated oil into the nearest stream and purchase some new oil!