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Originally posted by Flimflam:
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Originally posted by Patman:
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The important thing is, on a bang-for-buck basis, synthetic oil gives the motorist NO advantages over dino oil.
Sure it does, synthetics are for those who would rather not be stuck under their car every 3k. Some people's time is worth more than $$$.
For many car enthusiasts, their ride is their "baby." So, all that time being stuck under the car is not figured into the bean counting sessions.
The day when synthetics deliver 3X less wear, and guaranteed 3X longer service mileage than dino oil is the day I will switch over. And, oh yeah, I forgot to add: they got to be improved so that they don't kill my seals and gaskets, too!!!!!!!
So I guess you switched over to synthetics about 20+ years ago when they got the blend of group 4/5 correctly balanced for seals.
Rockwell extends the change interval on its transmissions from 100k to 500k miles with approved synthetics.
New corvettes have a 15k change interval with Mobil 1.
As for wear, a good pao synthetic will cut wear by more than half for some internal parts and many times that for others.
You seem to understand price but fail to understand cost. As in Total Cost of Ownership.
Here is a brief list of the benefits.
Better fuel economy over the length between oil changes.
Lower emissions.
Cooler operating temperatures.
Cleaner interior of engine and oil passages.
Extended oil drain intervals.
Less oil consumption.
Much less wear on engines parts and pvc valve.
Extends time between valve lash adjustments.
Virtually eliminates ring sticking and breaking.
Virtually eliminates valve guide wear.
Less wear on engine dry startups.
Less oil to reclaim.
Less empty oil containers and cartons in our landfills.
Less air pollution
More free time with less oil changes.
Why?
Thicker oil film for a given weight. HT/HS
Higher film strength 3000psi versus 500psi.
Additives don't have to work as hard and last longer.
Lower volitility.
Very low amount of VII
Synthetics film clings to metals longer
High viscocity basestocks remain shear stable.
The bottom line is that dinos cost more in time and money in the short and long run.
In a typical comparison of dino changed at 3k miles and Mobil 1 changed at 5k, the cost savings in fuel alone pays for the difference in price. In a long term test the maintenance costs saved will be double the costs of the oil.
If you typically trade your vehicle in after 5 yrs and 75k miles then the costs will be close but the savings will still go to the synthetic due to fuel, oil, and filter savings. The person who purchases the used car will be carrying the wear and tear loses.
How about it? Any dino users want to do a six month fuel economy and price test?