This is long; deleted some of it, from a British bike list I check in on -

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OIL IS KILLING OUR CARS!!!!!

By: Keith Ansell, Foreign Parts Positively, Inc.

About a year ago I read about the reduction of zinc dithiophosphate (ZDDP) in the oils supplied with API approval that could affect sliding and high pressure (EP) friction in our cars. The reduction of these chemicals in supplied oil was based on the fact that zinc, manganese and/or phosphates reduce the effectiveness and eventually damage catalytic converters and introduce minute amounts of pollutants into our atmosphere.

A month or so ago I had a failed camshaft and lifters back to me that had only 900 miles on them!! I immediately contacted the camshaft re-grinder and asked how this could happen. They were well aware of this problem as they were starting to have many failures of this type. In the past, the lack of a molybdenum disulfide camshaft assembly lubricant, at assembly, was about the only thing that could create this type of problem. My customer has assembled many engines and had lubricated the camshaft properly and followed correct break in procedures.

This got me on the phone to Delta Camshaft, one of our major suppliers. Then the bad news came out: It’s today’s “modern” API (American Petroleum Industry) approved oils that are killing our engines.

Next call: To another major camshaft supplier, Crane. They now have an additive for whatever oil you are using during break-in so that the camshaft and lifters won’t fail in an unreasonably short period of time. They also suggest using a diesel rated oil on flat tappet engines.

Next call: To a racing oil manufacturer - Redline. Their response: “We are well aware of the problem and we still use the correct amounts of those additives in our products”. They continued to tell me they are not producing API approved oils so they don’t have to test and comply. Their oils were NOT the “new, improved and approved” ones that destroy flat tappet engines! “We just build the best lubricants possible”. Sounds stupid, doesn’t it, New-Approved but inferior products.

To top this off: Our representative from a major supplier of performance and street engine parts (EPWI) stopped by to “warn us” of the problem of the NEW oils on flat tappet engines. This was a call that the representative was making only because of this problem to warn their engine builders! “The reduction of the zinc, manganese and phosphates are causing very early destruction of cams and followers”. They are recommending that, for now at least, there must be a proper oil additive put in the first oil used on new engines, beyond the liberal use of molydisulfide assembly lube. They have been told that the first oil is the time the additives are needed but remain skeptical that the first change is all that is necessary. Their statement: Use diesel rated oils such as Delo or Rotella that are usually available at auto stores and gas stations.

This problem is BIG! American Engine Rebuilder's Association (AERA) Bulletin #TB2333 directly addresses this problem. I had a short discussion with their engineer and he agreed with all that I had been finding.

Next phone call was to a retired engineer from Clevite, a major bearing and component manufacturer. First surprise was that he restored older British Motor bikes. The second surprise was that he was “VERY” aware of this problem because many of the old bikes had rectangular tappets that couldn’t rotate and are having a very large problem with the new oils. He has written an article for the British Bike community that verify all the “bad news” we have been finding.

Comp Cams put out “#225 Tech Bulletin: Flat Tappet Camshafts”. They have both an assembly lube and an oil additive. The telling sentence in the bulletin was “While this additive was originally developed specifically for break-in protection, subsequent testing has proven the durability benefits of its long term use. This special blend of additives promotes proper break-in and protects against premature cam and lifter failure by replacing some of the beneficial ingredients that the oil companies have been required to remove from the off the–shelf oil”.

Now what do we do?

From the camshaft re-grinders (DeltaCam) “Use oils rated for diesel use”, Delo (Standard Oil product) was named. About the same price as other quality petroleum based oils. They are not API formulated and have the zinc dithiophosphate we need in weights we are familiar with.

From the camshaft manufacturer (Crane): “use our additive” for at least the first 500 miles.

From General Motors (Chevrolet): add EOS, their oil fortifier, to your oil, it’s only about $12.00 for each oil change for an 8 ounce can (This problem seems to be something GM has known about for some time!).

From Redline Oil: Use our street formulated synthetics. They have what we need!

From Castrol: We are beginning to see a pattern emerging on older cars. It may be advantageous to use a non-approved lubricant, such as oils that are Diesel rated, 4 Cycle Motorcycle oils and other specified diesel oils.

Be aware that “New and Improved”, or even products we have been using for many years, are destroying our cars as it isn’t the same stuff we were getting even a year ago.

For the cars that use “engine oil” in their gearboxes this may even pose a problem as these additives that have been removed could be very critical in gear wear. We will be using oil specifically formulated for Manual Gearboxes with Brass Synchronizers. The only oils we are aware of that fit the criteria are from General Motors and Redline.

If you have any additional input let us know. We need to let every flat tappet engine owner, i.e.: every British Car owner know that things are changing and we MUST meet the challenge.

At this time, late October 2006, it appears that our old staple, Castrol, has reduced the ZDDP in GTX to about half what it used to be. The safest bet right now seems to be either the use of Redline (synthetic) or Valvoline VR1. Today I purchased 7 quarts of Valvoline VR1 20W-50 at AutoZone for $2.79/quart.


Oil is Killing our cars Part II

Last month’s report on this subject is turning out to be just the tip of the iceberg! Many publications have had this subject of zinc-dialkyl-dithiophosphate (ZDDP) covered in varying depths over the last few months. Some publications have even had conflicting stories when you compare one month’s article with their next month’s article! They are all ending up supporting our report.

Now for the latest report:
#1 Castrol GTX 20W-50 is still good for our cars after break-in! 10W-40, 10W-30 and other grades are NOT good. Absolute NOT GOOD for any oil (Any Brand) that is marked “Energy Conserving” in the API “Donut” on the bottle, these oils are so low with ZDDP or other additives that they will destroy our cams. Virtually all “Diesel” rated oils are acceptable.
#2 Castrol HD 30 is a very good oil for break-in of new motors. This oil has one of the largest concentrations of ZDDP and Moly to conserve our cams and tappets.
#3 Only an unusual Castrol Syntec 20W-50 approaches the levels of protection we need when we look to the better synthetic lubricants. We are attempting to get this oil but will be using Redline 10W-40 or 10W-30 as these are lighter weights for better performance, flow volume, less drag and has the additive package we need.
#4 The trend today is to lighter weight oils to decrease drag, which increases mileage. Most of these seem to be the “Energy Conservation” oils that we cannot use.
#5 Redline oil and others are suggesting a 3,000-mile break-in for new engines! Proper seating of rings, with today’s lubricants is taking that long to properly seal. Shifting to synthetics before that time will just burn a lot of oil and not run as well as hoped.
#6 The “Energy Conservation“ trend was first lead by automakers to increase mileage numbers and secondly because the ZDDP and other chemicals degrade the catalytic converter after extended miles, increasing pollution. We don’t have catalytic converters and the mileage gains are not that significant for most of us.

For you science buffs: ZDDP is a single polar molecule that is attracted to Iron based metals. The one polar end tends to “Stand” the molecule up on the metal surface that it is bonded to by heat and friction. This forms a sacrificial layer to protect the base metal of the cam and tappet from contacting each other. Only at very high pressures on a flat tappet cam is this necessary because the oil is squeezed/wiped from the surface. This high pressure is also present on the gudgeon pin (wrist pin) in diesel engines, therefore the need for ZDDP in diesel engines.
Second part of the equation is Molybdenum disulfide (Moly). The moly bonds to the zinc adding an additional, very slippery, sacrificial layer to the metal. I found out that too much of the moly will create problems; lack of this material reduces the effectiveness of the ZDDP. The percentage, by weight is from .01 to .02%, not much, but necessary.

Latest conclusions: Running our older, broken in engines on Castrol 20W-50 GTX is ok.
Break in a new engine for 3,000 miles on HD 30 Castrol.
New engines (after break-in) and fairly low mileage engines will do best with the Redline 10W-40 or 10W-30 synthetic.

Keith Ansell, President
Foreign Parts Positively, Inc.
www.ForeignPartsPositively.com
360-882-3596

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