following manufacturers specs to the letter

DCzapla · 02-21-2012, 04:18 PM

Call me crazy but I've decided to check my owners manual and follow the reccomendations. I have an 07 Mustang GT very low miles 12,400 of which Im the second owner. Its been in storage for winter but when I get it out for this spring I will use motorcraft syn. Blend 5w20, and Motorcraft FL820S Oil Filter. Can't go wrong

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Boondoggie · 02-22-2012, 06:29 AM

okay, you're crazy-but.

I do the same thing. 40k on my 05GT here.

Unleashedbeast · 02-28-2012, 12:50 AM

I prefer to use true synthetic 0W-30 to 10W-30 lubricants that are barely over the 30 grade viscosity standard. Amsoil, Royal Purple, Red Line, etc...

The engine wears less and you gain mpg.

CAFE laws - efficiency testing post