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1950s vintage oil vs modern oil test

toyotafan

Toyota Truck Club Founder
Staff member
1000 Posts
This was really in interesting. Watch the end.
 

kennythewelder

Moderator
Staff member
100 Posts
Quaker state has always sludged up an engine, as well as Penzoil, Castor oil. This seems to be worse in hot climates, or that has been what I have seem first hand.
 

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