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correct weight oil and when to use synthetic #123055 09/19/08 09:57 AM 09/19/08 09:57 AM
Joined: Jan 2007 Posts: 8,048 Mt Morris Michigan mopar dave OP master
mopar dave OP master Joined: Jan 2007 Posts: 8,048 Mt Morris Michigan	i have a fresh 408 indy headed sb with solid roller cam. used primarily on the street. what weight oil should be used? it has .002" main and rod bearing clearance, but the t&d rockers dump alot of oil with the grooved cam jounals and full groove mains. also, when can synthetic oil be used? i'm concerned with rings seating well. Last edited by mopar dave; 09/19/08 09:59 AM.

Re: correct weight oil and when to use synthetic [Re: mopar dave] #123056 09/19/08 10:24 AM 09/19/08 10:24 AM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	I would use a 15/40 or 20/50 with a good filter, i would switch at about 2k miles to syn.

Re: correct weight oil and when to use synthetic [Re: mopar dave] #123057 09/19/08 12:14 PM 09/19/08 12:14 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: when can synthetic oil be used? i'm concerned with rings seating well. After breakin you can switch & use the lightest weight of oil that will maintain "adequate" pressure. live every 24 hour block of time like it's your last day on earth

Re: correct weight oil and when to use synthetic [Re: RapidRobert] #123058 09/19/08 03:04 PM 09/19/08 03:04 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	Read this Break in secrets. Then use a 10W-40 or 15W-40 synthetic oil and you should be good to go.

Re: correct weight oil and when to use synthetic [Re: RapidRobert] #123059 09/19/08 03:23 PM 09/19/08 03:23 PM
Joined: Apr 2008 Posts: 1,195 Snowing in the north! D Dart 340 moparts member
Dart 340 moparts member D Joined: Apr 2008 Posts: 1,195 Snowing in the north!	Quote: Quote: when can synthetic oil be used? i'm concerned with rings seating well. After breakin you can switch & use the lightest weight of oil that will maintain "adequate" pressure. I agree. I had to drop a weight in oil to help get my pressure down. I run 30-40 psi at idle and 60-70 psi @ 25oo rpm hot. Was higher than that with heavier oil!

Re: correct weight oil and when to use synthetic [Re: Spike] #123060 09/19/08 03:29 PM 09/19/08 03:29 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: Read this Break in secrets. live every 24 hour block of time like it's your last day on earth

Re: correct weight oil and when to use synthetic [Re: RapidRobert] #123061 09/23/08 10:16 AM 09/23/08 10:16 AM
Joined: Jan 2007 Posts: 8,048 Mt Morris Michigan mopar dave OP master
mopar dave OP master Joined: Jan 2007 Posts: 8,048 Mt Morris Michigan	thanks robert. interesting read. it may be to late for proper break-in. i have 160 miles on it now with some hard acceleration and decellaration, mostly cruising with varying throttle positions. http://www.youtube.com/watch?v=aIxaesJ190U http://youtu.be/lCZAaN7fFLg

Re: correct weight oil and when to use synthetic [Re: mopar dave] #123062 09/23/08 05:03 PM 09/23/08 05:03 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	Royal Purple 10-40 per my builder after 2500. Did a few WOT's before 2500. All is well after 20 thousand street miles. 440.

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