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using synthetic motor oil, what viscosity to use?? #112970 08/31/08 02:04 PM 08/31/08 02:04 PM
Joined: Aug 2004 Posts: 466 U.S.A. C Captain Flapjack OP mopar
Captain Flapjack OP mopar C Joined: Aug 2004 Posts: 466 U.S.A.	i know not to use it when braking in a motor, but after break in on a fresh street motor what viscosity is good to use where i normally would use 10/40 non synthetic?

Re: using synthetic motor oil, what viscosity to use?? [Re: Captain Flapjack] #112971 08/31/08 03:36 PM 08/31/08 03:36 PM
Joined: Jan 2003 Posts: 4,558 Montana F FuryUs master
FuryUs master F Joined: Jan 2003 Posts: 4,558 Montana	Use whatever weight you would normally use.

Re: using synthetic motor oil, what viscosity to use?? [Re: FuryUs] #112972 08/31/08 04:02 PM 08/31/08 04:02 PM
Joined: Jan 2003 Posts: 4,866 N. of 8mile, S. of heaven Spike Go Blue!!
Spike Go Blue!! Joined: Jan 2003 Posts: 4,866 N. of 8mile, S. of heaven	10W-40 is a good choice.

Re: using synthetic motor oil, what viscosity to use?? [Re: Spike] #112973 08/31/08 05:23 PM 08/31/08 05:23 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	10-40 synthetic sounds fine to me. When pouring, it'll pour thinner than a conventional 10-40, but will protect better across the board.

Re: using synthetic motor oil, what viscosity to use?? [Re: DaytonaTurbo] #112974 08/31/08 08:11 PM 08/31/08 08:11 PM
Joined: Dec 2004 Posts: 5,278 San Jose, California D DennisH Vacation
DennisH Vacation D Joined: Dec 2004 Posts: 5,278 San Jose, California	10-40. Royal Purple.

Re: using synthetic motor oil, what viscosity to use?? [Re: Captain Flapjack] #112975 09/01/08 02:02 AM 09/01/08 02:02 AM
Joined: Jan 2003 Posts: 5,186 Wherever I am. J Junky master
Junky master J Joined: Jan 2003 Posts: 5,186 Wherever I am.	Shell Rotella T 5W40 synthetic in my 383. Plenty of zinc to protect the valves. 2010 Black Challenger SE <> 3.5 V6 Custom Shift Knobs www.flameball.com Check It Out

Re: using synthetic motor oil, what viscosity to use?? [Re: Junky] #112976 09/01/08 08:15 AM 09/01/08 08:15 AM
Joined: Jan 2006 Posts: 8,162 USA 3 360view Moparts resident spammer
360view Moparts resident spammer 3 Joined: Jan 2006 Posts: 8,162 USA	it is interesting that Shell is emphasizing the anti-soot-thickening properties of their new formulation to combat what is happening with increased EGR in the diesel trucks http://fleetowner.com/equipment/shell_releases_rotella_synthetic_0519/

Re: using synthetic motor oil, what viscosity to use?? [Re: Captain Flapjack] #112977 09/01/08 10:50 AM 09/01/08 10:50 AM
Joined: Apr 2008 Posts: 1,285 Pacific NW USA CompSyn pro stock
CompSyn pro stock Joined: Apr 2008 Posts: 1,285 Pacific NW USA	I�d try 10W-30 first. If you get 10psi of oil pressure per 1000rpm with it, then you are right on. And if the 10W-30 works fine, you�ll be getting a little less drag on the internal engine parts and better oil cooling through improver flow over the slightly thicker 10W-40. CompSyn 4655554-Amsoil_mopp_amsoil_engine_challen.gif (20 downloads)

Re: using synthetic motor oil, what viscosity to use?? [Re: Junky] #112978 09/01/08 11:49 AM 09/01/08 11:49 AM
Joined: Nov 2007 Posts: 21,845 Kirkland, Washington Pacnorthcuda Too Many Posts
Pacnorthcuda Too Many Posts Joined: Nov 2007 Posts: 21,845 Kirkland, Washington	Quote: Shell Rotella T 5W40 synthetic in my 383. Plenty of zinc to protect the valves. I would think you would be choosing a high zinc oil to protect the cam/lifters...

Re: using synthetic motor oil, what viscosity to use?? [Re: Captain Flapjack] #112979 09/03/08 09:14 PM 09/03/08 09:14 PM
Joined: Aug 2004 Posts: 466 U.S.A. C Captain Flapjack OP mopar
Captain Flapjack OP mopar C Joined: Aug 2004 Posts: 466 U.S.A.	a friend has some extra penzoil 5w 30 synthetic is that ok?

Re: using synthetic motor oil, what viscosity to use?? [Re: Captain Flapjack] #112980 09/03/08 11:46 PM 09/03/08 11:46 PM
Joined: Aug 2004 Posts: 1,213 Los Angeles, CA Mobarge pro stock
Mobarge pro stock Joined: Aug 2004 Posts: 1,213 Los Angeles, CA	Royal Purple 10W-40. High zinc content as well. '71 SSP - SOLD!

Re: using synthetic motor oil, what viscosity to use?? [Re: Captain Flapjack] #112981 09/04/08 05:08 AM 09/04/08 05:08 AM
Joined: Jan 2003 Posts: 4,866 N. of 8mile, S. of heaven Spike Go Blue!!
Spike Go Blue!! Joined: Jan 2003 Posts: 4,866 N. of 8mile, S. of heaven	Quote: a friend has some extra penzoil 5w 30 synthetic is that ok? When you start getting into the 5W-30, 0W-30, etc you have to be concerned with the zinc content. It may need more zinc to help protect your cam.

Re: using synthetic motor oil, what viscosity to use?? [Re: Spike] #112982 09/04/08 05:44 AM 09/04/08 05:44 AM
Joined: Apr 2008 Posts: 1,285 Pacific NW USA CompSyn pro stock
CompSyn pro stock Joined: Apr 2008 Posts: 1,285 Pacific NW USA	Quote: Quote: a friend has some extra penzoil 5w 30 synthetic is that ok? When you start getting into the 5W-30, 0W-30, etc you have to be concerned with the zinc content. It may need more zinc to help protect your cam. Very true, most of the 0W, and 5W oils that I know of currently are the lower zinc 800 ppm API SM rated lubes. One exception I know of, and there may be others, is Amsoil�s SAE 5W-30 Synthetic Heavy Duty Diesel Oil. The zinc level in this oil would provide excellent protection for a flat tappet cam with 1379 ppm of zinc. Also, the High Temperature/High Shear Viscosity (ASTM D-4683) of this lube is 3.4, so this oil has great film strength for greater protection under heavier loads. This oil was designed for heavy duty diesel engines and improved fuel economy, but useful in high performing gas engines requiring higher levels of zinc. Amsoil 5W-30 Synthetic Heavy Duty Diesel (HDD) link CompSyn

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