Originally Posted By: ARCOgraphite
Originally Posted By: hate2work
Originally Posted By: ARCOgraphite
with likely INCREASED wear rate.
So if I run Pennzoil Platinum Plus / Pennzoil Ultra / Castrol Edge to 7500 miles instead of the factory recommended 5000 miles, my engine will suffer increased wear?
Depending on individual chemistry and formulation, the surface competition between detegent and AW and Ester/AN could show increased wear - absolutely. Your savior would be that over an extended interval the detergency will be come depleted and the wear rate will decrease. A Good dino with modest and appropriate TBN retention should provide a lower wear rate over a std 5K interval vs. a high TBN "synthetic" group III/PAO blend oil. An 8k OCI would most likely be the break-even point regarding wear running a high detergency "synthetic". This is an old lesson, data driven. The big mistake would be using a high detergency "synthetic" and changing out early thinking you are doing your engine a benefit. You would most likely have a very clean engine but shortened service life due to high wear rate.
What data do you have to back this up?
A few questions:
1. What is the LONGEST you've ever had an engine last?
2. What is the longest you've run an engine without ANY sort of mechanical problems?
3. What is the longest you've run synthetic oil in an engine for (total duration, not OCI)?
4. What kind of back-to-back wear-rate testing have you PERSONALLY done with Synthetic and conventional oils to validate your above statements/claims?
I feel obligated to address this because you make statements like the above frequently and without any basis on this board. Yet you have by your own admission killed more engines on this board than probably the rest of us combined. Engines from almost every manufacturer, am I correct? As this is what you've stated in the past, and said it was due to the abuse inflicted upon the vehicle by your own driving habits.
So if you've never actually accrued any insanely high mileage on ANY oil because you can't seem to keep an engine together long enough to glean any sort of real data, and you change oil brands frequently and bounce from products like Castrol Edge to Snowblower oil, then it really begs the question as to how you can make such statements, and do so with the conviction and absolutism that you've done so in this thread if you lack any REAL data other than your own opinion to back it up.
I've got limited experience here myself. But both of my examples are in fact high mileage on synthetic. One exclusively on Mobil 1, making 100HP more than stock, getting beat on like a red-headed step-child and the oil has managed to:
1. Keep it clean.
2. Keep it mechanically healthy.
This is verifiable via internal photos, the fact that it has 38psi of oil pressure hot at idle. Which is within "new" spec for the engine and measured via a mechanical Autometer gauge. As well as the fact that there is no ring ridge in the cylinders and visible cross-hatching in the bores with no scoring or wear marks at all.
And this is an engine with 330,000 HARD Km's on it.
Then we have Doug Hillary's Detroit Diesel fleet test using Delvac 1 with the 1.3 million Km tear-down pictures and measurements that were "within new" spec. And this is running OCI's that were close to 100,000Km's...... in 500HP diesel engines.
So if you really have some FACTUAL data to bring to the table that you can use to support your statements, I am really all ears!
I'm not trying to be rude. Just politely asking you to back up what you've been stating.