Are you at all familiar with just exactly what makes "diesel" rating qualify? I've heard additives not used in common motor oils. Then there's the rating "system", which once was straightforward and made sense, now consists of gibberish of letters and numbers.
synthetic won't break down at 20k but you've just driven around sloshing 20k miles of soot in your crankcase. Yeah i know modern engines are cleaner, bla bla. Theoretical is good on paper but common sense is better for my cars. Better to change any oil before it breaks down (takes a long time even with conventional) AND before it becomes dirty. I'd take conventional oil changes at 5k any day vs a synthetic change at 10k+. I do synthetic at 5 to 7k depending on the vehicle use conditions. you do you.
Thanks brah, but I don’t need your, or anyone’s permission to “do me”. The “soot sloshing around in there” was entirely irrelevant. The motor ran great, and used virtually zero oil until long after the trucks useful life span.
Brah? I'll promise to use synthetic from now on for 20k miles ruining my engines and not force you to, do you, if you'll promise not to use 'brah'...
At one time, I loved pissing matches. Now in my old age, I see the waste of time......and let the miscreants go on raving amongst themselves.
Equally lame is “you do you” which is what i was making fun of using to term “brah”. Sorry the joke didn’t land. Pour sand and coconut oil in your crank if you want.
I agree with you 100%. There are acids and other contaminants that build up in oil as a result of the combustion process that are not good for load bearing surfaces. These contaminants aren't removed by conventional oil filters. The only way to remove them is by changing the oil that carries them. I too would rather do 5k conventional oil changes than 10k-20k changes with synthetic oil when using regular oil filters. Personally, I don't see where synthetic oil offers much more of a benefit over conventional oil when changes are done at 5k intervals, or less. I run synthetics in my Mustangs because I drive them like I stole them. I don't in my 2010 Mountaineer since I change oil in all the vehicles at 5k miles. I also will run Seafoam in the oil for about 200 miles before every third oil change on average. I have never had an oil related engine failure of any type for as far back as I can remember. Or experienced excessive oil use in an engine that got worse over time. I am not saying synthetics aren't better than conventional oils but I am not sold that any differences between them makes much of a difference, if any, in real world use for most people with the exception of those living in very cold climates.
Even then there will be some contaminants that even a new filter will not remove. There are probably more benefits gained from replacing a quart of dirty oil with a clean, fresh one.
