Quote:
Originally Posted by funola
"On my personal vehicles 2% soot with 0W-40 synthetic oil is simply indicating oil change needed now."
Do you really use 0W-40 oil in your diesel or was that a typo?
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Yes, especially in winter.
Exclusively Synthetic oil, unless I am breaking in a rebuilt engine.
During the summer I have no hesitation using 5, 10, 15, or even 20W40.
The qualifier is what is cost effective for you.
My average driving is wildly variable across the fleet 1k - 35k miles per year.
The least used vehicles have 0W40 at all times, and are changed at 9k miles regardless of months/years.
The highest use vehicle has 0W40 in winter, and usually 10W40 in summer.
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ASE Master Mechanic
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Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician.
Noise Vibration and Harshness (NVH).
Dynamometer.
Heat exchanger durability.
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1985 300SD
1983 300D
1984 190D
2003 Volvo V70
2002 Honda Civic
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