This tag should be used for anything related to the use of automotive engine oil, or in reference to other parts of the car that also require lubrication using oil.

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Running in oil a for light diesel engine (Japanese, Toyota 3L)?

What would you use as a running in (break-in) oil for this engine? I have this engine, and it has just been reconditioned, new pistons, conrods, crank and bearings.
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Additives in Engine Oil

As engine oil is been used in the engine, it gets aged and therefore oligomers are formed. Is there a way that we can separate these oligomers without affecting the additives in the oil???
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Are More Recent API Oils always “Better”?

The API ( American Petroleum Institute ) provides certifications for engine oil. Such certifications range from SA for 1930's era vehicles up to the current standard SN. The above linked document ...
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Diagnosing oil consumption on Nissan VQ35DE (350z / G35)

I have a 2004 Infiniti G35 6MT coupe. Nissan VQ35DE engine with a bit over 156,000 KMs (about 96,000 miles). Since I bought it, I've noticed some oil consumption at a rate of about a litre every 4,...
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My 05 F150 engine knocking

Drove it - reached destination and started knocking - NO oil on dipstick. Put in 5 quarts of oil - ran fine until reached next destination - started knocking again - oil was present this time - drove ...
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1998 Plymouth Voyager

The oil pressure cluster light is coming on and the chime sound as well,the oil level seems fine. Wondering what the problem may be? The 1998 voyager has 138,000 miles and next oil change is not due ...
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Hyundai Santa Fe - Engine Oil Pressure Valve

Does anyone know where a 2007 Hyundai Santa Fe CRDI Engine Oil Pressure Valve is?