Originally Posted By: gathermewool
Originally Posted By: fdcg27
It would be intersting to do a sort run of this stuff in any car in warm weather and then used oil analysis it.
I think everyone would be surprised at how good the results would be.
Alternatively, you could mix a quart at a time with any modern oil in any engine and it would be just fine.
I'd sell the staright grade oil to an air cooled VW owner or for lawnmower use.
You could mix it with a modern oil in warm weather, though.
Yes, because the modern oil would be able to keep up and maintain clean the engine during a short run while the old oil degraded quickly.
IMO, using this oil is like using old pain killers: it may not hurt anything, but it for sure isn't helping anything, I.e., no money is saved, nor is there any net positive.
Maybe not.
In a moderate performance engine, older spec oils can do just fine, just as they did when they were current spec oils.
There was a guy here who ran some old SF Shell Fire and Ice in his wife's Grand Am with a pretty good used oil analysis.
I've searched for the used oil analysis and have not succeeded in finding it.
A straight thirty or forty wouldn't be suitable for too many modern engines, although the OM of our Forester allows for the use of either under severe conditions, although the OM recommends API SL as the minimum spec.
