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#1363719 - 02/05/09 02:56 PM Re: Need suggestions for Northstar Motor [Re: mag176]
CBOYLE15 Offline

Registered: 12/10/06
Posts: 22
A couple more things.
Do not use ANY additive in the motor.
Use exactly 7.5 quarts with a filter. Do not just pour in 8 quarts.
Run it up in 2 gear to about 70 MPH and let off the gas as it slows down the Northstars like the sucking on deceleration that helps with the carbon. Do it 2 or 3 times in a row.
Enjoy your Ride!

#1363740 - 02/05/09 03:18 PM Re: Need suggestions for Northstar Motor [Re: CBOYLE15]
lexus114 Offline

Registered: 05/12/08
Posts: 5974
Loc: Easton, PA
Just curious,why don`t you recommend synthetic oil in this application?
2012 Mercedes-Benz C300 4matic
2005 Lexus RX330 AWD

#1363817 - 02/05/09 04:27 PM Re: Need suggestions for Northstar Motor [Re: lexus114]
CBOYLE15 Offline

Registered: 12/10/06
Posts: 22
My 1999 SLS never leaked a drop until I changed it over to Mobil 1. Just my experience. We recently took delivery of a 2008 STS with a 3.6 Direct injection. Mobil 1 is required.

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