Best oil to use?

[rusty ol ranger]

yeah now that you mention it, I've heard about leaks from synth
should I try to find totally non-synth in a non-Motorcraft brand?

I run valvoline semi synthetic and havent had an issue. I run the maxlife with a FL1A filter in both my 2.9 and 460.

Id run either semi syn or conventional.

 

[James Morse]

OK thanks. I did use Valvoline in years past without issues.
Ordered the Motorcraft filter, diff one, but, yeah.