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Changes in motor oil manufacturing additives

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Larry in Tn

07-07-2007 12:20:07

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Has anyone seen or heard anything about the changing of how motor oil is made and the eventual phasing out of the oil's that are suitable for use in old cars and tractors not to mention all the small 20 horse and under engines. It seems the EPA has given all the refineries orders to change the oil composition and the process is well along it's way.

www.oldduggy.com

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Jon Hagen

07-10-2007 08:21:38

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

Yes, it is a problem that will get worse when the zinc phosphate additives are pulled out of diesel oils too in the near future. The engines that are at most risk are those built in the late 50's to early 80's with flat tappet cams that were designed for detergent oil with EP additives. The really old stuff was designed before these extreem pressure additives were used in motor oil and should be ok. The day may come soon where we need to do our own motor oil additive blend for those older engines. Anyone know if the oil additive concentrate like GM EOS (engine oil suppliment) concentrate is still avalible from the car manufactures. I used to use it in race engines with high lift flat tappet cams with very high valve spring pressures. It really increased cam life under very tough conditions, especially during new cam breakin.

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Ludwig

07-10-2007 06:54:30

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

Oh geez you just hadta... :)
I use Mobil 1 in almost everything now and the Super M is next on the list once I use up my supply of Delvac 1300.
On an old engine that might be affected by the loss of the zinc I'd be using a heavier diesel type oil anyway...

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lucasss

07-08-2007 09:30:23

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

went to synthetic in all my engines because of this.lucas

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johnlobb

07-08-2007 02:40:40

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

If anyone has interest in this subject, (or oil or gas filters, additives, etc) go to "bobistheoilguy.com." Many experts in the field of oil blending, etc post on a regular basis.

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Gerald J.

07-07-2007 16:48:48

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

I posted at length here and on the unofficial Allis Chalmers discussion group back in December.

The best I can tell SM oils may not have the anti wear zinc compound, while previous oils SL, SJ, and SF (sold for older engines according to its label and on the shelf at wally world) as well as diesel oils have plenty of that zinc compound.

When I did that search using google I found many discusssions of cams wearout out before the first oil change after a rebuild and as many paroting the official word that SM oil is better than any previous oil for ANY age and design of engine.

Some say that while that particular zinc compound is kept out of the newest oils, other additives take its place. I'd like to see some independent testing, especially for sliding cam followers.

I've gone to Mobil 1 synthetic 0W40 for my Golf because its about the only oil that meets VW specifications (just Amsoil and VW oil otherwise in the USA as far as I can find) and I've not changed the truck oil but its been doing OK on Ford (Motorcraft) oil, sounding better with their new synthetic blend.

Gerald J.

An oil discussion

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L.C.Gray

07-07-2007 15:34:05

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

I read an article in CarCraft a while back concerning breaking in new race cams and they adressed this issue. They wrote the phasing out of the zinc and other metalic wear additives was prompted by the car manufactures. The claim is that the metalic additives are hard on O2 sensors and catylitic converters. Nearly all, if not all, of your new engines have roller cams and don't need the heavy wear additives. There are people who are losing the lobes on their new high lift cams in mere hours not knowing the difference in the new (SM rating I think) oil.

Car Craft's solutions:

Special wear additive for cam break-in available from GM and others

Expensive race formulated oils

Delo or Rotella diesel oils

They showed the parts per million of metalic wear additives in the $9 a quart race oils vs the $8 a gallon diesel oils and the PPMs were close to the same.

I'm now running Delo 400 in my jet boat with a fresh 455 Olds and its new race cam.

I'm now very careful about reading the API ratings and buy what the engine really needs rather than just the latest greatest "highest rated" oil.

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Charles (in GA)

07-07-2007 14:47:37

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

Oil manufacturers have had to remove the zinc from motor oil. It is a wear additive. That is why there are special motorcycle engine oils out there now, they really need and still have, the zinc in the oil. Even synthetics such as AMSOIL use zinc in the motorcycle oils.

Charles

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Greg_Ky

07-07-2007 12:51:23

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Re: Changes in motor oil manufacturing additives in reply to Larry in Tn, 07-07-2007 12:20:07

Thats why I run Shell Rotella in everything except my 06 F-150 it gets Mobil 1.

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