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Grand Muckety Muck
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710 Posts
Castrol has always been a good oil to use. Though Mobil 1 is good on my car...

I use Castrol in everything else I have.
 

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Bronco Member
Joined
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40 Posts
I have had very good luck with my 1986, 5.0Ltr, FI engine using Quaker State Oil, 10W-30, Semi-synthetic Motor Oil. I have a Jasper Rebuilt engine with 95K Miles on it, but conditions are very good with this oil. I have a Lincoln Continental with a 3.8Ltr, V6 in which I started using this oil, and I did directly notice a difference. My lincoln was equipped with a electronic "MPG" gauge, and when completely switching to the synthetic compound I read at least 1-3 more MPG on the meter. I do a lot of driving and my route was pretty much consistent from one day to the next. Under very similar conditions the synthetic formula returned a increase in MPG, and was measurably cleaner after replacement. I am also using the FRAM HI-Flow Oil Filter with each replacement. I have substituted this setup, and formula on the Bronco.
 
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