Changing to synthetic, weight reccomendations?

Jsun3701

New Member

Dec 10, 2004

124

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0

Virginia

Jan 11, 2007

#1

• Jan 11, 2007

• #1

Im changing my oil to synthetic before I drive to Philly this weekend, reccomendations on what weight I should use? Yes Im using the Mobil 1 filter. Also throwing in some Lucas. Not looking to start a long thread, just asking if you have made the switch, what witch weight gave you the best results.

 

Rickyll7

Member

Dec 16, 2005

718

4

19

Jan 11, 2007

#2

• Jan 11, 2007

• #2

use 5w30 mobile 1 and dont use that extended performance crap either, change it every 3k or 3 months, its worth it.

 

Jsun3701

New Member

Dec 10, 2004

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Virginia

Jan 11, 2007

#3

• Jan 11, 2007

• #3

You found that a syn 5-30 is better than a Dino. 5-20?

 

Rickyll7

Member

Dec 16, 2005

718

4

19

Jan 11, 2007

#4

• Jan 11, 2007

• #4

5w20 MIGHT gain you 2-3 rwhp an .7 mpg. but I will not run it. ford made the change to the 5w20 for the mpg gain, however, they have not changed their engine tolerances to compensate for this. i would stick with the 5w30. but its up to you. im sure in the short run, it wont matter, but 100k miles from now, who knows

 

LaserRed01GT

Banned

Oct 3, 2006

739

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Clearwater, FL

Jan 11, 2007

#5

• Jan 11, 2007

• #5

I use Mobil 1 5w20 full synthetic and a Motorcraft filter. The Motorcraft filter is much better at appropriately controling drain back on these motors.

There is nothing wrong with running the 5w20 in regards to oil/bearing clearances. The oil/bearing clearances on these factory motors are plenty tight.

 

streethorse

15 Year Member

Oct 8, 2005

1,042

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58

Dallas Texas

Jan 11, 2007

#6

• Jan 11, 2007

• #6

5w20 in the winter and 10w30 in the summer.

 

Dope 97GT

New Member

Jul 16, 2005

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Rochester, NY (SUNY Brockport)

Jan 11, 2007

#7

• Jan 11, 2007

• #7

I run Motorcraft synthetic 10w30 in my car. I also know that the mobil 1 stuff if very good as well.