The Pennsylvania Crude Myth was interesting and I can see how some thing, that was NO Myth at the time, keep going after the situation wasn't true, do to additive package, and better processes that made them Equal
Detergent oil Myth: I understand what happened, learned and can understand the fear (that was always beat into my head as a you kid)that my dad would tell me...........WHAT EVER BRAND OF OIL THE PREVIOU OWN USED! you HAD BETTER ALSO, OR IT WILL START USING OIL AND NEVER STOP!.....kind of understand why he would have said that and believed it and i still fallowed his thoughts.................Unless the previous own used Pennzoil! i would always us the brand of oil that they used......Have kinda fallen a way form this practice years back...........and especially sence this ZDDP has hit the scene!!!!!!!
The Synthetic oil Myth: Hmmm, Maybe I'm going to be one of them that keep the myth alive! BUT, I believe that almost all factory eng. are.........run in(semi broke in before they are shipped...."Just my opinion") and today rings, seat much quicker then the old.............remember CHROME rings.......took for "ever' to seat the Rings, created all kinds of heat in the cooling system.........but once you got them seated........You cylinder walls would wear out first!
IN my opinion, syn. will just cause the rings a longer time to seat in
Engine Oil Myth: Ha yes, the meat of the story!!!
Read the first paragraph........."Myth promoted by the antique and collector car press" Hmmm well i will leave that statement right there.
There own words, ZDP(ZDDP) was raised to 0.08 in the mid 50's because of valve and cam wear due to hi lift cams.
ZDDP was first added to oil to extend the life of rod and main bearing........sound like its good stuff to me.
Can we have to much of a good thing.........Yes according to test that were taken when ZDDP wasn't a liability!!!! over 0.14 it starts to head toward hindering instead of helping! and by 0.20 your creating or shortening the life of you eng! In other works, don't fill you crank case up with just bottles of the E.O.S!
One side note, E.O.S is what has all the ZDDP in it! GM also sell M.O.A which is not the same.....E.O.S is what you want!
they even say that a higher lever of ZDDP(0.14) is Good for flat tappets and valve train for scuff and wear!!!!!
They basically tell you that 0.10 was the perfect amount for any eng up to or until the era of the Cat!!!!!!
They say that ZDDP level have been slowly dropping over the past 10-15 years(they new were they were heading and the Flat tappet eng was not going to make it!!)
Now that there story is up to the days of the cat's............the first statement the grabs me, is there comparison to the 0.08 ZDDP that was good enough for the Hi lift cam in the 50's.........My first thought is the 50's 0.08 ZDDP was the MINIMAL, OR THE LEAST that the ZDDP could be at...............Now it's the "MAX" it can be at In other words, star burst oils (New oil formulas) rarely make it up to 0.08 for fear of going over the now illegal level for star burst oil!!!
Next, They "say" ........."that BackWards Computability was of grate important with the group of experts from the "OEM"s oil company's(I still wonder just exactly what the means????)
Now for the test of there Quote "Backwards Compatibility tests!
test #1 the over head cam that they make sure you know is NOT A ROLLER CAM/ ROCKER ARM ENG!!!!! Well OK, it is in fact not a roller cam YES. it is a cam "slide" follower type cam......kind of like a flat tappet cam..............seams like a fair test.......right?
test #2 a Flat Tappet V6 eng(they say) that is similar to the 80 vintage(does any on remember the lack lust gutless wonders of the 80's??????????
OK we now that from what we have read, in this article and what we have discuss in this form, that lift.......or spring pressure created by lift(hi lift) is what requires at least 0.08 to 0.10 ZDDP oil package.
I bet that if you have a oil sample of the oil that they use, it wouldn't be .0001 below the 0.08 star burst oil recipe!!!!!
Now, Test #1: Since it is and over head cam eng. It Need much less spring pressure for the same lift, due to the loss of push rods and lifters that would require more spring pressure to keep it on the lobe............Will this eng survive with 0.08 or less ZDDP
YES, THERE WOULD BE MUCH LESS SPRING PRESSURE THEN WOULD BE REQUIRE FOR A STOCK 4.0L
Test #2 Flat tappet V6 eng similar to the 80's vintage:...............would this be a High lift cam eng....NO, is this the cam lift even close to the so called HI lift of the mid 50's not even close.
So, yes GM was thing about it previous built eng(Backwards Computability)......as far back as there would possibly being a warrantable claim!!
Why didn't GM us a 3d test, a real test of like......Aammmm......lets say a 68 396 or or even one of those Hi reving small blocks of the day? Because the star burst oil is only as go as the oil that was made back in the 50's???????????????????????
They should have been testing the muscle car eng of the last 60 and eary 70's (this era they seam to avoid with most of the discussion......as there backward testing, was in no way tested at all!
Will our stock 4.0L survive on star burst oil????? I say YES
Will i back up my word and start using star burst oil in my 300,000 mile jeep NOW??????? NO!!!!! I say yes because the spring pressure would be vary close to that of the V6..................
Will a performance cam, 4.0 or stroker survive on star burst oil........ONLY AND I SAY ONLY!!!! if the cam don't require more pressure then the stock spring ......BUT remember even a stock spring will put more pressure on a lifter as the lift of the cam increases above the stock lift.
Final thought, GM is a flat tappet cam manufacture and has some of the highest standers of quality control of the industry( mostly because, most of what they made when into there product...............Makes you wonder how much longer they will be in the business, of making a product that they no longer us..............
In my opinion, this is far from a myth.............some day, when they find a proven additive that works a good as ZDDP and is a no ash or will not affect emission devices...........will this one become a REAL MYTH!!!!!!!!!!
My hot are is done ...........care to share yours?
Flash
