What Happens When You Don't Change the Oil
Dear Lord. According to the article this was the engine of an Audi TT that had not had its oil changed for 84,000 miles. There's not much detail beyond that, but the article has a higher resolut...
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We had Cummins "L" series motors that had their oil change every 11k to 14k miles in a heavy stop and go duty cycle. Far worse than anything anybody on this board would subject their vehicle to. We determined this was the limit through an oil analysis program for those engines, popping the valve cover off, it was nice and clean all over the valve train. Never had an issue with gunk/varnish building up on those engines. Once our motors are outside of warranty, we do a rigorous oil analysis program to determine how far we can take the oil change interval out and still have plenty of buffer before the oil is too well used. I'm perfectly fine with my 15k oil change intervals, but warranty keeps me at 6 months (which is anywhere between 5k and 9k miles for me).
Any Particle Quantifier analysis would tell you how big the "Chunks" of material are in your oil, so for those sludged up engines, you'd see it in the analysis. You'd also see plenty of soot. Your base/acid number would also be fairly low and your additive package would be well diminished when compared to new.
Any Particle Quantifier analysis would tell you how big the "Chunks" of material are in your oil, so for those sludged up engines, you'd see it in the analysis. You'd also see plenty of soot. Your base/acid number would also be fairly low and your additive package would be well diminished when compared to new.
