Recent Topics
Now this is a good job.....
by ZZman - 12/15/19 09:26 AM
Polish snow plow
by P10crew - 12/15/19 08:53 AM
Scary winter drive helping gf's dad pick up new van
by caprice_2nv - 12/15/19 07:53 AM
Royal Purple Max-Tane
by RogerBacon - 12/15/19 07:32 AM
Mixing oil
by DerekPho - 12/15/19 03:03 AM
Grease plus Gear Oil
by PumpPusher - 12/15/19 12:59 AM
Costco/Kirkland 5qt-2pack synthetic $29.99
by wgtoys - 12/14/19 10:31 PM
Mercedes delays EV release
by JeffKeryk - 12/14/19 09:33 PM
Retired. Dreams are of work...
by rekit - 12/14/19 08:19 PM
Silly to charge a brand new battery?
by jayjr1105 - 12/14/19 08:06 PM
Help me pick a tire for our Volvo
by Ddub - 12/14/19 07:10 PM
Porter Cable 12V Batteries
by bcossa2001 - 12/14/19 06:52 PM
LG Red and Bio EP at Amazon
by demarpaint - 12/14/19 06:51 PM
2-stroke oil choices
by dnewton3 - 12/14/19 05:29 PM
Do cats like potato chips?
by atikovi - 12/14/19 03:45 PM
Buying a cheap, beater bicycle
by Oldtom - 12/14/19 03:14 PM
Metabo/Hitachi Impact driver $50
by Deere John - 12/14/19 03:03 PM
Ate up camshaft.pics
by Chris142 - 12/14/19 02:57 PM
Caprice cam swap. :)
by ls1mike - 12/14/19 02:55 PM
Newest Members
Maik, Pluckster, DerekPho, mikinko, merrittgene
70129 Registered Users
Who's Online Now
91 registered members (40Deluxe, alarmguy, alchargo, Ag76, 77GrandPrix, 8 invisible), 1,765 guests, and 16 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics298,824
Posts5,142,059
Members70,129
Most Online3,589
Nov 2nd, 2019
Donate to BITOG
Print Thread
Hop To
Page 1 of 2 1 2
Thoughts on this industry change to 5w30 #5237828 10/12/19 12:11 PM
Joined: Nov 2017
Posts: 16
S
Skier Offline OP
OP Offline
S
Joined: Nov 2017
Posts: 16
Attached is a screenshot of an advisory from PCM (the engines in Nautique boats). They are suggesting the 6.0L and some other engines switch to 5w30 Dexos 2 instead of 15w40. I know that Ilmor and Indmar are also saying run 5w30 in some of their newer engines.

I have a LS1 Engine and it's is similar to an 6L internally. I've always struggled running 15w40 and 15w50 since I got this thing . It's certainly not a run of the mill 5.7L Chevy Gen 1. I plan to keep my boat another 20 years and 2000 more hours so engine wear is a bid deal to me.

I know old school is run thick oil to handle fuel dilution and stress but I wonder how much stress my boat really sees pulling skiers at 3000-3500 RPM - this thing has 375 HP and it doesn't seem like it's breaking a sweat.

I'm still running PB 15w40, but Is there something special about the Dexos that is driving this decision ?

PS - what do you think of Rotella Gas Truck 5w30 in a boat ? Seems thicker than most. https://shell-livedocs.com/data/published/en/86da4bf5-68c8-4676-bbe7-a2d42cc13ba7.pdf

PCM Oil.jpg
Last edited by Skier; 10/12/19 12:37 PM.
Re: Thoughts on this industry change to 5w30 [Re: Skier] #5237936 10/12/19 02:44 PM
Joined: Feb 2009
Posts: 2,207
K
krismoriah72 Online Content
Online Content
K
Joined: Feb 2009
Posts: 2,207
Well changing your oil every 30-50 hrs or 120 days is going to be fun.

I would probably meet in the middle with a 5w40 and do 100hr+ oil changes.

Re: Thoughts on this industry change to 5w30 [Re: Skier] #5237958 10/12/19 03:28 PM
Joined: Oct 2010
Posts: 7,631
A
A_Harman Offline
Offline
A
Joined: Oct 2010
Posts: 7,631
I don't think fuel dilution would be an issue in modern port-injected engines like the LS1.
Mine always worked fine with 5w30 used in track days. In that environment, I was continually cycling the engine from 3000-5500 rpm.
3000-4000 rpm pulling skiers doesn't sound like it will overwork a 5w30.
I tended to choose oils that were on the stout side of the 30 grade, and always with 3.5 HTHS.
Rotella Gas Truck 5w30 may be good since it's formulated for trucks and has good oxidation resistance.


2008 Dodge Ram 3500 diesel/G56
1985 Z51 Corvette track car 355/6-speed
2002 Camaro Z28 LS1/6-speed
2001 Dodge Ram 2500 diesel/NV4500+GV
1972 GMC 1500 shortbed project truck 307/SM465
Re: Thoughts on this industry change to 5w30 [Re: Skier] #5238101 10/12/19 07:17 PM
Joined: Dec 2011
Posts: 2,126
B
BISCUT Offline
Offline
B
Joined: Dec 2011
Posts: 2,126
Just going off my friends with boats. Both friends have 600k+ with smallest being 45ft IIRC. Both are gas and from what I can see the PITA it is to do basic maintenance on the gas engines pays off in the long run. In the NorthEast 0-40 is a good compromise with short seasons due to winter. I would think Ohio seasons relatively similar. 100 engine hours is a good benchmark depending how hard you drive it. Have you changed the oil in your engine? How hard is it? Some engines in boats are just horrendous to get to.


2015 F150 Lariat M1 5-30 EP FRAM Ultra(40k)
2017 Sub OB M1 5-30 EP FRAM Ultra(70k)


Re: Thoughts on this industry change to 5w30 [Re: Skier] #5238117 10/12/19 08:02 PM
Joined: Nov 2017
Posts: 16
S
Skier Offline OP
OP Offline
S
Joined: Nov 2017
Posts: 16
I typically change every 40-60 hours anyway at the end of each season. It takes 15 minutes to change because it’s a straight inboard and I trailer it.

I just thought it odd the lower viscosity. I have wanted to run a stout 5w30 but haven’t because everyone typically runs 15W40. If it was a standard 350 I wouldn’t question it. The Corvette engine is what has me wondering.

Re: Thoughts on this industry change to 5w30 [Re: Skier] #5238238 10/13/19 03:42 AM
Joined: Feb 2013
Posts: 3,792
Silverado12 Offline
Offline
Joined: Feb 2013
Posts: 3,792
On my boat with a 4.3 GM engine the oil gets pumped out through the dipstick tube, so not hard to do. I wouldn't use oil that thin unless I were going to change it more often.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Thoughts on this industry change to 5w30 [Re: Skier] #5240045 10/15/19 08:24 AM
Joined: Jul 2012
Posts: 3,453
A
alarmguy Online Content
Online Content
A
Joined: Jul 2012
Posts: 3,453
Wow, Im clueless, manufacturer is supposed to know best. I dont know if I could do it and go to a 5/30 but unusual for the service advisory so something maybe up and might be worth listening too. Just dont see how a difference from 40 to 30 could matter to the point that an advisory would come out. I suspect its needing the Dexos more then the 30.

One thing for sure your 375 HP engine has a lot less stress then a smaller engine.


14 Road King (current)
08 VStar 1300 Tourer
07 Suzuki C50
Re: Thoughts on this industry change to 5w30 [Re: Skier] #5244897 10/20/19 10:56 AM
Joined: Jan 2015
Posts: 1,461
R
ragtoplvr Offline
Offline
R
Joined: Jan 2015
Posts: 1,461
inboards typically run 140 to160F thermostats, so the oil does not get as hot as in cars and trucks with 200 degree thermostats. Lighter oil will have more throw off from rods to cool pistons and dissipate heat from bearings. I don't think you will see an issue.

Rod

Re: Thoughts on this industry change to 5w30 [Re: ragtoplvr] #5251999 10/28/19 09:16 AM
Joined: May 2006
Posts: 2,333
another Todd Offline
Offline
Joined: May 2006
Posts: 2,333
Originally Posted by ragtoplvr
inboards typically run 140 to160F thermostats, so the oil does not get as hot as in cars and trucks with 200 degree thermostats. Lighter oil will have more throw off from rods to cool pistons and dissipate heat from bearings. I don't think you will see an issue.

Rod


True, but they do run under a constant load and high throttle positions unlike in cars and trucks.


2015 Ford F250 Diesel Crew Cab FX4
2017 Ford Escape 2.0
2002 GMC Yukon
2015 Hyundai Accent
2008 Yamaha Rhino 700 FI
Re: Thoughts on this industry change to 5w30 [Re: ragtoplvr] #5252471 10/28/19 07:35 PM
Joined: Sep 2003
Posts: 5,879
B
Bluestream Offline
Offline
B
Joined: Sep 2003
Posts: 5,879
Originally Posted by ragtoplvr
inboards typically run 140 to160F thermostats, so the oil does not get as hot as in cars and trucks with 200 degree thermostats. Lighter oil will have more throw off from rods to cool pistons and dissipate heat from bearings. I don't think you will see an issue.

Rod

Don't confuse water temps with oil temps. the 160 Thermostat is to meet coast guard regulations. The oil on these engines runs far hotter than in cars due to the load. It would be like pulling a 400o lb trailer with your truck at wide open throttle all day long


2000 VW Beetle 1.8T M5
2006 Pathfinder 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser
Re: Thoughts on this industry change to 5w30 [Re: Bluestream] #5254803 10/31/19 07:10 AM
Joined: Jul 2012
Posts: 3,453
A
alarmguy Online Content
Online Content
A
Joined: Jul 2012
Posts: 3,453
Originally Posted by Bluestream
Originally Posted by ragtoplvr
inboards typically run 140 to160F thermostats, so the oil does not get as hot as in cars and trucks with 200 degree thermostats. Lighter oil will have more throw off from rods to cool pistons and dissipate heat from bearings. I don't think you will see an issue.

Rod

Don't confuse water temps with oil temps. the 160 Thermostat is to meet coast guard regulations. The oil on these engines runs far hotter than in cars due to the load. It would be like pulling a 400o lb trailer with your truck at wide open throttle all day long


True = there is no correlation of oil and water temperatures.

False = the 160 Thermostat is to meet coast guard regulations.

________

Marine engines have 160 degree thermostats to prevent salt from crystalizing inside of the engine. 160 degrees is that magic number where this can start to occur.

(this is from a site discussing the benefits of closed cooling in marine engines)
"
Besides exposure to corrosive materials in the water, raw-water cooled engines suffered from another major drawback. They had a thermostat, just like all engines, but it was regulated at 145-150° F. This was done to minimize the possibility that salt in the salt water would separate out and crystallize inside the engine’s cooling passages, with 160°F being the critical turning point for this to occur. "

Last edited by alarmguy; 10/31/19 07:15 AM.

14 Road King (current)
08 VStar 1300 Tourer
07 Suzuki C50
Re: Thoughts on this industry change to 5w30 [Re: Skier] #5255712 11/01/19 07:14 AM
Joined: Nov 2017
Posts: 16
S
Skier Offline OP
OP Offline
S
Joined: Nov 2017
Posts: 16
i did a little more reading and from what I can tell they are doing the lower viscosity on some of the new PCM engines due to problems with failing oil pumps. And also for the direct injection engines.

I'm still sticking to my 15w40 ... If it aint broke, don't fix it.

Re: Thoughts on this industry change to 5w30 [Re: Skier] #5258778 11/04/19 11:20 PM
Joined: Sep 2010
Posts: 10,933
4WD Offline
Offline
Joined: Sep 2010
Posts: 10,933
It mentioned direct injection … perhaps they want the Dexos 1.2 for LSPI concerns … and a big portion of 5w30’s carry the license (pretty much that and 0w20)

Guess we were typing at the same time … might want a lube that lowers calcium by use of magnesium

Last edited by 4WD; 11/04/19 11:22 PM.
Re: Thoughts on this industry change to 5w30 [Re: Skier] #5258874 11/05/19 06:09 AM
Joined: Nov 2017
Posts: 16
S
Skier Offline OP
OP Offline
S
Joined: Nov 2017
Posts: 16
you know I think you are on to something with Pre Ignition issues in DI engines. I wonder if they just said 5w30 to keep the recomendation consistent with all there new engines. The old engines they mention to say on 15w40 haven't been made in some time

Re: Thoughts on this industry change to 5w30 [Re: Skier] #5271561 11/19/19 07:26 AM
Joined: Dec 2017
Posts: 5,319
S
Snagglefoot Offline
Offline
S
Joined: Dec 2017
Posts: 5,319
I’m not sure how similar the blocks and oiling systems of the boat motors are to the car and truck engine but in 2014 GM changed the oiling system of the the 5.3 and 6.2 LS engines to run at 70 psi pressure, up from about 40 psi. Perhaps this figured in their decision?


If you want the job done right......do it yourself.
Page 1 of 2 1 2
Previous Thread
Index
Next Thread

BOB IS THE OIL GUY® Powered by UBB.threads™