Actually, testing is good not because it just tells you shear weight, but because they'll tell you how much junk has gotten in your oil. Shear weight is not the only thing that goes wrong with oil, and especially with synthetics it rarely fails. When I first learned of using extended drain intervals with synthetics, it was stressed to me that the reason I basically would have to change it wasn't that it would break down, but because it would get dirty. You can have oil that that has lost none of its shear, but is loaded with silica and still wears on your engine.The ony true way to know how well your oil's condition is, is to send it to a oil lab to be tested! Oil that has reaches its shear point is not visible!
bobistheoilguy.com is a big site with info about UOA (used oil analysis) evidently, plane owners and truck fleet managers have done UOAs for decades.I shall check into oil-testing for both my vehicles.
That sounds like a great idea, especially since I want to prolong the time between changes!
I fail to see the "reality of it" in your explanation. Yes- many people will go on draining and throwing out perfectly good oil, based on outworn beliefs about oil performance. I've read the whole thread, and NOBODY called ANYBODY an "evil earth killer." Just people who waste their money. Human nature does not change, only their fashions and gadgets.So call me an evil earth killer. I changed my oil today with 'only' just under 3700 miles on it. Twas pretty black, but not obviously gritty or even grainy looking. Now, I put in a quart between the last change and this one, because of previously mentioned leaks. When I ran the engine for a couple of minutes after changing the oil and re-checked the level after a few minutes of sitting, the oil didn't show much darkening from residue in the engine.
As for $25 for an oil analysis - that's more than this oil change cost me. I did it myself, and for $20 I could have someone else do it. To the average consumer, its not worth much of their time to send off a sample, and then really try to figure out what the results mean, and decide a course of action. If you find out you need to change your oil every 7500 miles anyway, the cost becomes a wash. Not saying changing is right vs testing, just explaining the reality of it. As it is, the business model doesn't support testing as effective for private individual owners. It remains the territory of fleet management.
That's not the way I remember it. In the bad ol' days (50's thru 70's)Heck, in the 60's, a car was pretty much meant to be kept, it was meant to
be worked on, I believe later in the 60's is when the planned-obsolescence
of everything started to rear its ugly head. Now, it is almost a throw-away
world -- a car today suddenly becomes a dishwasher next week!
I am referring to older cars that HAD MAINTENANCE performed on a regular basis - as OPPOSED TO most people (even my dad) who opted not to take good care of their cars and instead, just trade them every two years causing things to transpire as you mentioned.That's not the way I remember it. In the bad ol' days (50's thru 70's)
most cars were totally clapped out by 70k miles -- with lots of repairs
required to even get that far. Cars were NEVER longer-lived or more reliable than they are today.