Home » Public Forums » GMCnet » Re: [GMCnet] Wich oil is better? ( Blackstonr's view )
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| Re: [GMCnet] Wich oil is better? ( Blackstonr's view ) [message #321210 is a reply to message #321187] |
Fri, 28 July 2017 13:27   |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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It's like Ford vs Chevrolet. Ain't a nickel's worth of difference in 'em.
But, try to convince a Chevrolet owner of that, or, a Pennzoil user.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Jul 28, 2017 11:13 AM, "Bob Dunahugh" wrote:
Justin. Well put. Any oil that fallows Petroleum Institute standards are
good oils as long as there used as intended. And this study shows that.
Use what ever brand YOU feel comfortable with.
As to ZDDP. It's been seen that if you use your flat tappet engine as a
daily driver. Then lower levels of ZDDP are fine. The problem with our
GMC's. Is that our GMC's set for long periods of time. Cold starts are
the problem. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Thursday, July 27, 2017 11:02 PM
To: gmclist@list.gmcnet.org
Subject: RE: Wich oil is better? ( Blackstonr's view )
I thought the review was well written. Come paired good oils. The only
thing is that all engines were of modern design. And not the dirty engine's
of the 70's. And really. Our engines aren't relevant to oil producers
anymore. Rotalla stood out because it has about 400 PPM more of zinc then
most of the oils. And zinc is very important for old design engines like
ours. As for Kieth's good fortune with Amsoil. Great. But I think that any
of the oils reviewed would have performed as well. As for me. I get my oil
in a 55 gal barrel that is mixed to my specifications. And that spec is
very close to Rotalla. And then 1600 PPM zinc. I use that oil in everything
from race engines, dump truck, diesel Bobcat/Kabota tractor, to the GMC.
And try to keep the oil changes under 2500 miles on the GMC. Drain the
trans fluid every year.( Has a drain plug. ) Change trans filter every
other year. FD is every other year. Do I go overboard with this schedule.
YOU BET. Oils cheep. Parts aren't.
Bob Dunahugh 78 Royale
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| Re: [GMCnet] Wich oil is better? ( Blackstonr's view ) [message #321215 is a reply to message #321210] |
Fri, 28 July 2017 15:27 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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Jim, go look at the article Fred Hudspeth linked. That testing protocol
reveals real differences, but not based on the usual dimensions that people
proclaim. He tests to failure, and it is likely that our engines do fine on
a oils that aren't as highly rating in his testing. That's where it doesn't
make much difference.
His most recommended oil was Mobil 1 5W30, which is hardly
earth-shattering. But there were oils from other makers that were good,
too. And a few we have liked that were much lower down in his ranking (but
still good enough).
He also made the point that oil change intervals were as important as
choosing a good oil. (He recommended every 5000 miles or every year,
whichever is more frequent.)
Rick "thinking he came to conclusions consistent with solid mechanicking
experience" Denney
On Fri, Jul 28, 2017 at 2:27 PM, James Hupy wrote:
> It's like Ford vs Chevrolet. Ain't a nickel's worth of difference in 'em.
> But, try to convince a Chevrolet owner of that, or, a Pennzoil user.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
> On Jul 28, 2017 11:13 AM, "Bob Dunahugh" wrote:
>
> Justin. Well put. Any oil that fallows Petroleum Institute standards are
> good oils as long as there used as intended. And this study shows that.
> Use what ever brand YOU feel comfortable with.
>
> As to ZDDP. It's been seen that if you use your flat tappet engine as a
> daily driver. Then lower levels of ZDDP are fine. The problem with our
> GMC's. Is that our GMC's set for long periods of time. Cold starts are
> the problem. Bob Dunahugh
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Thursday, July 27, 2017 11:02 PM
> To: gmclist@list.gmcnet.org
> Subject: RE: Wich oil is better? ( Blackstonr's view )
>
>
> I thought the review was well written. Come paired good oils. The only
> thing is that all engines were of modern design. And not the dirty engine's
> of the 70's. And really. Our engines aren't relevant to oil producers
> anymore. Rotalla stood out because it has about 400 PPM more of zinc then
> most of the oils. And zinc is very important for old design engines like
> ours. As for Kieth's good fortune with Amsoil. Great. But I think that any
> of the oils reviewed would have performed as well. As for me. I get my oil
> in a 55 gal barrel that is mixed to my specifications. And that spec is
> very close to Rotalla. And then 1600 PPM zinc. I use that oil in everything
> from race engines, dump truck, diesel Bobcat/Kabota tractor, to the GMC.
> And try to keep the oil changes under 2500 miles on the GMC. Drain the
> trans fluid every year.( Has a drain plug. ) Change trans filter every
> other year. FD is every other year. Do I go overboard with this schedule.
> YOU BET. Oils cheep. Parts aren't.
>
> Bob Dunahugh 78 Royale
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
'73 X-Glacier 230 "Jaws"
Northern Virginia
Offlist email: rick at rickdenney dot com
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| Re: [GMCnet] Wich oil is better? ( Blackstonr's view ) [message #321218 is a reply to message #321215] |
Fri, 28 July 2017 15:37 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Senior Member |
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Rick, I did read the blog. The test methods that he uses are consistent
with destructive testing. His results are accurate and repeatable. I find
no issues with any of it.
Well broken in, work hardened flat tappet camshafts and followers,
LIKE WE HAD AS STANDARD EQUIPMENT IN OUR OLDSMOBILE ENGINES, are much lower
pressures than his tests, but, they are cast iron, not hardened steel. If
they had surface hardening, it was not very thick. Aftermarket cams and
that stuff? Who knows.
Jim Hupy
On Jul 28, 2017 1:27 PM, "Richard Denney" wrote:
> Jim, go look at the article Fred Hudspeth linked. That testing protocol
> reveals real differences, but not based on the usual dimensions that people
> proclaim. He tests to failure, and it is likely that our engines do fine on
> a oils that aren't as highly rating in his testing. That's where it doesn't
> make much difference.
>
> His most recommended oil was Mobil 1 5W30, which is hardly
> earth-shattering. But there were oils from other makers that were good,
> too. And a few we have liked that were much lower down in his ranking (but
> still good enough).
>
> He also made the point that oil change intervals were as important as
> choosing a good oil. (He recommended every 5000 miles or every year,
> whichever is more frequent.)
>
> Rick "thinking he came to conclusions consistent with solid mechanicking
> experience" Denney
>
> On Fri, Jul 28, 2017 at 2:27 PM, James Hupy wrote:
>
>> It's like Ford vs Chevrolet. Ain't a nickel's worth of difference in
> 'em.
>> But, try to convince a Chevrolet owner of that, or, a Pennzoil user.
>> Jim Hupy
>> Salem, Or
>> 78 GMC ROYALE 403
>>
>> On Jul 28, 2017 11:13 AM, "Bob Dunahugh" wrote:
>>
>> Justin. Well put. Any oil that fallows Petroleum Institute standards
> are
>> good oils as long as there used as intended. And this study shows that.
>> Use what ever brand YOU feel comfortable with.
>>
>> As to ZDDP. It's been seen that if you use your flat tappet engine as
> a
>> daily driver. Then lower levels of ZDDP are fine. The problem with our
>> GMC's. Is that our GMC's set for long periods of time. Cold starts are
>> the problem. Bob Dunahugh
>>
>>
>> ________________________________
>> From: Bob Dunahugh
>> Sent: Thursday, July 27, 2017 11:02 PM
>> To: gmclist@list.gmcnet.org
>> Subject: RE: Wich oil is better? ( Blackstonr's view )
>>
>>
>> I thought the review was well written. Come paired good oils. The only
>> thing is that all engines were of modern design. And not the dirty
> engine's
>> of the 70's. And really. Our engines aren't relevant to oil producers
>> anymore. Rotalla stood out because it has about 400 PPM more of zinc
> then
>> most of the oils. And zinc is very important for old design engines like
>> ours. As for Kieth's good fortune with Amsoil. Great. But I think that
> any
>> of the oils reviewed would have performed as well. As for me. I get my
> oil
>> in a 55 gal barrel that is mixed to my specifications. And that spec is
>> very close to Rotalla. And then 1600 PPM zinc. I use that oil in
> everything
>> from race engines, dump truck, diesel Bobcat/Kabota tractor, to the GMC.
>> And try to keep the oil changes under 2500 miles on the GMC. Drain the
>> trans fluid every year.( Has a drain plug. ) Change trans filter every
>> other year. FD is every other year. Do I go overboard with this schedule.
>> YOU BET. Oils cheep. Parts aren't.
>>
>> Bob Dunahugh 78 Royale
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> '73 X-Glacier 230 "Jaws"
> Northern Virginia
> Offlist email: rick at rickdenney dot com
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
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