Synthetic oil for 72,000 miles

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Feb 2, 2006 | 08:11 AM

#16

Randy Taylor

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Joined: Apr 2002

Posts: 179

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From: PA

I run 5-50 Syntec with Prolong. Change it every 5,000,and i have 185,000 on my 97 4.6 and the only thing i had to do to the engine was plugs, wires, and clean the EGR ports at 125,000.

Feb 2, 2006 | 08:20 AM

#17

PONY_DRIVER

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Joined: Jan 2003

Posts: 1,034

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From: VA

Quote:

Originally Posted by 98Navi

5/20 is what you would consider a semi-synthetic. I carry it in bulk and its price even in bulk reflects it. I carried for a short time the full synthetic 5/20, but it showed relatively no difference for the price differential and I abandoned the line.

Mobil 1 is Fully Synthetic is it not?

Feb 2, 2006 | 11:18 AM

#18

jenkins1849

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Joined: Jan 2006

Posts: 37

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From: Statesville NC

I use Mobile 1 and as far as i know it is fully synthictic oil

Feb 2, 2006 | 09:56 PM

#19

zx12-iowa

Senior Member

Joined: Apr 2005

Posts: 571

Likes: 1

From: minnesota - ubetcha

Most synthetics are very similar in additives and longevity. Any full synthetic 5/20 or 5/30 should be fine. But if you are changing at 3,000 intervals - its a waste of $.

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