Agreeing with me..... doesn't it feel good to know you are on the winning side. I'll try to do better next time.
BG Pre-Lube is a great assembly lube that I've had good luck with. It coats and clings to the parts nicely until start up. Of course you should always prime the oil pump right before first fire. Its BG part #825
That's not the way the spec reads. CI-4 was fine, and you can still get it. CJ-4 there is some question, the spec says no, lots of people say yes. I'd rather not take the chance. Yep the spec points to a big no for the newer formulations.
Are you refering to GM's EOS (engine oil supplement)? Every new engine Ive ever broken in got a can of EOS. When this whole zinc scare came about, I couldnt find EOS, and was told that it was discontinued, along with the older formula STP, etc... Did they reformulate the EOS, or do you have a stockpile of it?
They still have it on the shelf @ Cable Dahmer in Independence. The last I got was in a dusty can but they have it in the display case in the service waiting room it looks like new. I guess they could have reformulated it. I'll ask the next time I'm up there. OH duh yes EOS. The only other break in oil or additive I have ever used was back in the late '60s and '70s I used Castrol break in oil in the race bikes. I really liked the smell of that stuff.
E.O.S. has been reformulated. General Motors discontinued it a few years ago, and then brought it back under a different part number. Also, the old number reatailed for around $6.00, and the new number retails for over $20.00.
I was stoked to see that EOS was available again, then I saw the price! Still cheaper than a rebuild though! I think I may go with the Red Line zddp additive at around $14.00 a bottle. Ive got a friend who works for JB aka: Justice Brothers but I havent heard anything, good or bad, about their zzdp additive. Does anybody have any experience with their stuff?
I just did some research and its being said that the GM EOS formula was not changed and it is now marketed as an assembly lube (possibly to get around the EPA?) rather than an additive. Does anyone have access to an MSDS for the old part number vs. the new?
Even the big rigs are running catalyctic converters now, so I wouldn't rely on diesel motor oil for zinc content.
i had a friend read this question, he's a engine builder and writer of "the small block chevy interchange manual, and worked for stp this is his reply; Zinc dialkyl- and diaryldithiophosphates are used in nearly all lubricating oils as anti-wear agents. These compounds are multifunctional because they are also anti-corrosive and anti-oxidative (helping to keep condensed water from forming rust on iron parts inside the crankcase). They have been used since the 1930s and today are the dominant anti-wear agent used. In recent years the zinc content has been reduced because of catalytic converter grid plating concerns. To explain, some high mileage engines, that consume oil because of their age, were thought to zinc metal foul the catalytic converter grid, thereby reducing the devices effectiveness at managing emissions. Typically SH rated oils contain more Zinc that SJ oils so older (before the chemical was legislated away by the EPA) is better and if ZDDP is listed on the label of your old can of STP, the chances are that there is more zinc by volume in that little container than in a full quart of todays motor oil. I have used old containers of STP without a problem. There is more zinc in a quart of CC and CD rated Diesel engine oil (no exhaust stream catalytic converter) but those blends are made for a very different (acids, salts, sulfur and soot-waste) crankcase environment. I doubt that using lubricating oil designed for a Diesel engine would cause a mechanical failure in a gasoline engine but some Texaco R&D folks I worked with said that Diesel engine oil chemistry is wrong for the neoprene seals of a gasoline engine. They were concerned about leaking. However, since I never tested Diesel oils in gasoline engines, I cant say for sure. No disrespect intended to others who have posted opinions here but during ten years of working at STP Research & Development in Connecticut, I never saw any separation of chemicals happen inside a container of STP Oil Treatment. And, STP never caused OXIDATION! Ford has always blamed other products for mechanical problems? Ford had so many design flaws they said anything to void the warranty. By the way... STP won that lawsuit and Ford had to honor all previously denied warranty claims. Happy Motoring David Lewis
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