5w20 vs 5w30

oldfarmerMember

I have a Taurus with the 3 liter Duratec engine. Recommended oil is 5w20. It's not always easy to get in my area. The 5w30 is everywhere. Is there any problem with using 5w30 instead if I can't easily find the other? Do any of you use it in your Duratecs?

Also our Aviator with 32v 4.6 liter V8 is supposed to burn 91 octane gas. Does anyone here have one that they have tried 89 or even 87 in? Any problems with lower octane? How low can you go?
It's my first post here, thanks!

10/1/055:23 AM

Original Post

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