Questions about Mobil1.

This is about my use of synthetic oil and Mobil1, as generated by questions from my post titled Mobil1.

Can you elaborate a little more on what those numbers mean? Those lower percentages of metals, are those presumably worn off from engine parts? What made you decide to try Mobil 1? I've heard that synthetics are much better in low temperatures, so this is good timing.

First you need to know what I am using for my limits, this comes from Bob is the oil guy.

Table I. Engine problems predicted with oil analysis.
Indicator
Acceptable Levels
Engine Problem
What to Check
Silicon (Si) and Aluminum (Al)
10 to 30 ppm
Dirt ingestion
Air intake system, oil filter plugging, oil filler cap and breather, valve covers, oil supply
Iron (Fe)
100 to 200 ppm
Wear of cylinder liner, valve and gear train, oil pump, rust in system
Excessive oil consumption, abnormal engine noise,performance problems, oil pressure, abnormal operating temperatures, stuck/broken piston rings
Chromium (CR)
10 to 30 ppm
Piston ring wear
Excessive oil blow-by and oil consumption, oil degradation
Copper (CU)
10 to 50 ppm
Bearings and bushings wear, oil cooler passivating,radiator corrosion
Coolant in engine oil, abnormal noise when operating at near stall speed
Lead (Pb)*
40 to 100 ppm
Bearing corrosion
Extended oil change intervals
Copper (CU) and Lead (Pb)*
10 to 50 ppm
Bearing lining wear
Oil pressure, abnormal engine noise, dirt being ingested in air intake, fuel dilution, extended oil drain intervals
Aluminum (Al)
10 to 30 ppm
Piston and piston thrust bearing wear
Blow-by gases, oil consumption, power loss, abnormal engine noise
Silver and Tin
2 to 5 ppm 10 to 30 ppm
Wear of bearings
Excessive oil consumption, abnormal engine noise, loss in oil pressure
Viscosity Change
Lack of lubrication
Fuel dilution, blow-by gases, oil oxidation, carburetor choke, ignition timing, injectors, injector pump, oil pressure
Water/Anti-freeze
Coolant leak or condensation
Coolant supply, gasket sealed, hose connection, oil filler cap and breather
* Significant as wear metal, only for engines using unleaded and diesel fuel.

As you can see he also says what the cause of the metal is, and also other things also.
My numbers,Iron- 12 ppm with Yamalube 10w40[ will be given first], 8ppm with Mobil1 a drop 25%, Lead- 4 ppm, down to 0, Copper- dropped from 15 ppm to 5 ppm, Chromium and Aluminum both went from 3 ppm to zero ppm, neither sample had any Nickel or Silver, and Tin dropped from 2 ppm down to 0 ppm.
Those are wear metals, and based on these numbers I would have to conclude that synthetic oil does indeed cause less wear on engine parts.

What made me try Mobil1? Two things I came from the air force where I worked on F-15 aircraft. The turbine engines used synthetic oil and I we ever did was sample it, after every flight.
I know of only 2 times the oil was changed both involved bird strikes. So I knew that synthetic oil would preform at high temp.
I researched different synthetic oils and went with Mobil1 based on cost and several people I know who use it, but I can get it at Costco for $30.00 a case of six. I use a liter of oil for each change so six will get me 5 changes and a bottle of make up oil to use to make the liter.

Yes synthetics do flow better in the cold, Mobil1 has a pour point of -45C, much colder than I will ride in. It also has a flash point of 224C.

I hope this has answered some questions about my use of Mobil1, and you find it useful in making your decision whether to use synthetic oil or not.