| Re: [GMCnet] Oil WARS ( again) [message #163890] |
Thu, 22 March 2012 17:54  |
rallymaster
Messages: 662
Registered: February 2004
Location: North Plains, ORYGUN
Karma: -4
|
Senior Member |
|
|
Hey, guys, I thought it wasn't a problem until the Feds mandated lower
amounts of ZDDP last year. What you've done for the last 20 years
doesn't count.
RonC
On Thu, 22 Mar 2012 16:16:02 -0500 Bob de Kruyff <NEXT2POOL@AOL.COM>
writes:
>
>
> MIGUEL MENDEZ wrote on Thu, 22 March 2012 14:15
> > hmmmm, well lets see, Mellings cams, lifters and rocker arms, in
> the cam pakage, it states to use rotela t, dello 400 or delvac,
> because they have more than enough zink.
> >
> > i have been using dello 400 here for years and even still today,
> and i have as of yet had any valve train problems, i really think
> this zink thing is really over kill, like the 3000 mile oil change,
> good god, i do mine at 5000 min and 7000 max, and stll have not had
> a problem.
> >
> > in our trucking business, oil has to have enough zinc, a 14l
> diesel motor cost way to much, and i know many truck driver who
> would be very upset to find out there heads went bad due to low zinc
> ???
>
> We have 100,000 trucks on the road, some still with flat tappets. We
> run the same oil in everything no matter where they are and how old
> they are. Many have well over 200,000 miles and never had a low zinc
> attack.
> --
> Bob de Kruyff
> 78 Eleganza
> Chandler, AZ
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
Ron & Linda Clark
1978 Eleganza II
North Plains, ORYGUN
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
|
|
|
|
| Re: [GMCnet] Oil WARS ( again) [message #163898 is a reply to message #163890] |
Thu, 22 March 2012 19:47  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
""Hey, guys, I thought it wasn't a problem until the Feds mandated lower
amounts of ZDDP last year. What you've done for the last 20 years
doesn't count.
""
I don't think too many of us are living in the past. The facts have pointed to a problem only with cam break-in and not units in service with any amount of miles on them. Our flat tappet engines are still accruing several million miles a year with no problems.
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
| Re: [GMCnet] Oil WARS ( again) [message #163899 is a reply to message #163890] |
Thu, 22 March 2012 20:03 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
|
Senior Member |
|
|
Most likely a broken-in flat hyd cam will be fine with even then SN oils now on the shelf provided you run stock valve spring pressures, and a non insane cam profie (most MH grinds are not) The way I understand SM to SN update did not lower ZDDP but made other improvements. Though ZDDP is lower these days, there are other additives in the newer oils that can act as friction modifiers. What it really comes down to is spring pressures and how agressive the cam is and if you have a muliplier in the rocker (higher lifter foot pressures). Or if the lifters and /or cam are offshore junk. All that said staying around 1200 PPM is cheap insurance and not so much necessary on the road, but our vehicles have a more severe wear issue after long (months) oil drain down periods between starts. This is where it may help. Again, owning a GMC is like owning a horse----everyone has a different twist on how to maintain. Just MHO.
John Lebetski
Woodstock, IL
77 Eleganza II
|
|
|
|
| Re: [GMCnet] Oil WARS ( again) [message #163902 is a reply to message #163899] |
Thu, 22 March 2012 21:04 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
|
Senior Member |
|
|
| JohnL455 wrote on Thu, 22 March 2012 19:03 |
Most likely a broken-in flat hyd cam will be fine with even then SN oils now on the shelf provided you run stock valve spring pressures, and a non insane cam profie (most MH grinds are not) The way I understand SM to SN update did not lower ZDDP but made other improvements. Though ZDDP is lower these days, there are other additives in the newer oils that can act as friction modifiers. What it really comes down to is spring pressures and how agressive the cam is and if you have a muliplier in the rocker (higher lifter foot pressures). Or if the lifters and /or cam are offshore junk. All that said staying around 1200 PPM is cheap insurance and not so much necessary on the road, but our vehicles have a more severe wear issue after long (months) oil drain down periods between starts. This is where it may help. Again, owning a GMC is like owning a horse----everyone has a different twist on how to maintain. Just MHO.
|
Well said John
Bob de Kruyff
78 Eleganza
Chandler, AZ
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
