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Old 08-01-2018, 12:49 PM   #2
clyde
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Join Date: Oct 2003
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Quote:
Originally Posted by FC View Post
I have a leftover quart of the unobtanium Castrol OE oil. The last oil change, I filled with only Mobil1 EP.

For the next oil change, can I use up that quart and fill the rest with Mobil1 EP? They are the same 5W-20 weight.
Sell the unobtanium on ebay to pay for a full pan of Mobil 1 EP? If not, mix and match and don't worry.
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