Sorry to hijack, I just wanted to add to the discussion..
original balzer said:
Just my .02 but i honestly think that ANY test can be manipulated in favor of the brand the testers prefer.
Well, tests indicating the presence of wear metals, contaminants, and viscosity swings should all be conducted by independent labs like staveley, blackstone, etc. if they are to have any credibility.. product data sheets from an oil manufacturer are useful, but only tell half the story..
That said i have always run penzoil, have never had a failure due to lubrication, and I maintain my trucks as well as the average joe.
vehicles driven on the street won't have a lubrication failure ( unless you forget the drain plug)..what you have is premature wear over time.. Some would call that a lubrication failure too I guess, just not a very dramatic one..
We deal with large off road fleets that beat their equipment nonstop, and have tried everything else out there..when they had 'lubrication failures', it meant serious downtime.. So we prevent the dramatic kaboom, and the slow death of engine wear.. best of both worlds.. BTW, did you know you can have a lubrication failure, without losing a drop of oil? it's true..
Sorry i dont buy into the hype of synthetics or oil additives or brand wars. Penzoil is what my dad uses thats what i use, i figure as long as its a major brand name and not some $0.30 a gallon generic oil im safe.
Balzer
Well, you should at least be aware of changing oil specifications.. as of january 2007, the anti wear and anti scuff ingredients ZDDP, Phosphorus, and sulfur have been removed from gasoline & diesel vehicle oils for emissions reasons.. these ingredients produce metallic emissions, and poison emissions equipment.
be aware that when you see a label saying " blended to meet the tough new oil standards" all that means is that they are blending the oil the way they are mandated, and not doing anything special to protect your engine in the absence of these ingredients..
Some companies are dumping more moly into their blends, which can work, but moly is a metal too, so there are limits to how much they can dump in, and how much is enough?
I will leave it to the amsoil / RP / mobil one defenders to explain how their oils of choice do anything to make up for the loss of these ingredients..
We've solved the issue, but even if you never buy my stuff, please understand..oils are devolving into cheap commodities.. change your pennzoil at 2,000 miles, and if you are going to go longer, invest in oil analysis to see what's really going on in there..