What Oil Wouldn't You Run?

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I remember 20 years ago I used to scoff at Warren motor oil when I saw it on the shelf at 7-11 and some discount stores. I don't scoff at Warren Unilube now. They've grown, they've improved and they're value priced. My next OC in my Ridgeline will be Lubrigold 5w-20 synthetic @ $3.60 a quart.
 
Originally Posted By: Koz1
For me the particular engine makes a difference, some engines do better on one oil than another.
I can tell you a good story about my 2000 Mitsubishi V6 that destroyed only one type of oil conventional and synthetic. It had no problems with all the other oils I tried.
Other people swear by this oil.
I wanted to try it out one more time in a different engine and see what happens.
Am I a sucker for punishment or am i just giving this trusted brand a third chance?


Which oil is it?
 
If You really must know PYB circa 2001 - 2002 and Pen Ultra In 2011.
Its really odd my engine would be so destructive to these oils.
Im talking chunks in both cases, I thought I killed the engine. Not long OCIs only standard run of both.
Did an engine flush both times while at the garage, engine kept on ticking thankfully.
 
Originally Posted By: Koz1
If You really must know PYB circa 2001 - 2002 and Pen Ultra In 2011.
Its really odd my engine would be so destructive to these oils.
Im talking chunks in both cases, I thought I killed the engine. Not long OCIs only standard run of both.
Did an engine flush both times while at the garage, engine kept on ticking thankfully.


Right on!! Those Mitsubishi engines are pretty tough!!
 
Originally Posted By: NormanBuntz
I remember 20 years ago I used to scoff at Warren motor oil when I saw it on the shelf at 7-11 and some discount stores. I don't scoff at Warren Unilube now. They've grown, they've improved and they're value priced. My next OC in my Ridgeline will be Lubrigold 5w-20 synthetic @ $3.60 a quart.


According to PQIA, even 7-Eleven branded motor oil is pretty stout stuff...
 
Back before I thought I knew better, I selected oils based entirely upon price and would buy anything that met the appropriate API spec.
Now that I think I know better, there are certain oils I prefer, but given the 5-6K drains most of us seem to do, any API SL/SM/SN in a grade appropriate to the ambient temperatures encountered would work just dandy.
You only need worry about oil quality beyond the basic API spec if you have a demanding application or if you want to extend drains.
 
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