Much more oil data (a lot more)

Here again everything but viscosity is important. Maximize flow (cools engine, maximizes cleaning, minimizes build ups, neutralizes contaminants - to name a few), change oil frequently (removes built up water, contaminants, replenishes additives, removes corrosives, removes waxes and other contaminants that thicken oil - to name a few).

Here is more from your source Mitch:

It had been more than 5,000 miles since my last oil change and I was pretty sure my synthetic motor oil would survive the extended drain. Still, to ease my anxiety, I decided to do a little test on the oil - the blotter spot test using a business card from my wallet.
Within five minutes of spotting the card with oil from the dipstick, I knew something was horribly wrong. The heavy black soot in the oil was immobile, creating a sticky center on the card. This was not what I wanted to see and I knew it was symptomatic of an oil that had passed its prime.

Cause and Effect
Why did this happen? The main reason was my driving habits. I’m frequently away on business so my car sits in the garage most of the time. When I do drive, it’s usually short distances (typically 3 to 4 minutes to the office). This causes moisture to build up in the crankcase (perhaps as much as 20 percent), which in turn, causes additive distress, loss of dispersancy and sludge. The condition was compounded by the fact that it was January (cold driving conditions hold moisture longer in the oil).

The Solution
A double oil and filter change was prescribed. I knew from the blotter test results that the oil in my engine had thrown sludge, and soot had dumped (lost dispersancy). An oil change brings in a fresh supply of detergents and dispersants. With the single oil change, these additives would have lifted up much of the sludge and carried them to the filter. Consequently, the filter would have plugged within minutes, sending the oil into bypass and unfortunately, automobiles don’t have bypass indicators. By performing two oil changes, most of the sludge and deposits are discarded with the first oil and filter, enabling the second oil and filter to have normal service life. This was confirmed by another blotter spot test after the second oil change.

Aunt Minnie Drivers Give Synthetics a Licking
Even the very best motor oils cannot safeguard against sludge when free water is present. Within several minutes after starting an engine, the oil typically reaches the thermostat setting. This heat can drive off the moisture, even in cold winter conditions. However, it can sometimes take 15 to 20 minutes of continuous driving before the condensed moisture has dissipated. When water accumulates in sooty used oil and remains in the engine for an extended time, the damage to the oil is irreversible. This is why short-trip “Aunt Minnie” drivers need to change their car’s oil more frequently.

How frequently? If you are a short-trip driver like me, consider performing a simple blotter spot test before a scheduled oil change in order to regulate the optimum oil change interval to your driving conditions and climate. ...






When looking to buy a used car look for an oil change every spring and at least one other time a year. If the oil was not changed twice a year at a minimum it is a very bad sign. Ask where the car was driven. If they say that it was only driven 5 miles to restaurants or to work, this is really bad. If they only used 20W-50 or 20W-60 oil in that car, this is bad as it has thickened to glue. Mileage is a good thing if the oil was changed appropriately, often.

aehaas

 

One more thing, there are high revving motorcycle 2 stroke engines and many types of lawn maintenance equipment that are lubricated with gasoline and a touch of thin oil. The main problem there is build up of varnish causing wear and particulate wear.

People who use "high flow", non OEM air filters are increasing the particulate wear, adding to the problem.

Mitch, I will be going to the 20 wt oil in the Lambo at the next opportunity.

aehaas

 

I am going to try something here to better post data:

 

Let me try this again:



I have tried but cannot directly place a data sheet from Exel onto a page to view. Can somebody tell me how to do this.

aehaas