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gitsum

Spark myths

26 posts in this topic

On 10/22/2017 at 11:43 PM, Bobby MSME said:

OMG, you do not need a computer algorithm to know when oil needs changing.

First of all, we all have different driving habits. No computer program written by

some person out of college with a computer science degree and who is still wet behind 

the ears can encompass million different driving habits in her algorithm..

 

I use this 55+ year old method to determine if oil needs changing. Take the dipstick out,

look at the color of oil and sniff it. If it looks fairly clean (as opposed to dark & dirty) and

it does not smell burned, it is still useful oil. It will lubricate (primary purpose) and it will

carry heat out of the engine. I never had anything burned in the engine, in a couple of

million miles of driving over 55+ years. Only time I had a burned exhaust valve was when

the technician changed coolant in my 2007 Pontiac G5 and left air pockets in there which

made the engine run 10 degrees hotter than normal. It had nothing to do with oil change.

 

It is true that with fresh good quality oil the engine usually will sound like a purring cat.

However that effect disappears after a couple of hundred miles of driving. 

 

My first oil change is planned in February 2018, when the new 2017 Spark is expected

to be at about 7500 miles after 12 months of driving.  But I do keep an eye on the looks

and smell of the oil every month. Right now the oil looks in very good condition.

 

7500 MILES!!!!! I had my first oil change at 1200 miles and I felt nervous about THAT because I remember when 500 miles used to be the standard. Oil still looked clean on the dipstick but for peace of mind I couldn't wait to get the factory fill out of there. The Chevy garage changed it for free so I didn't get to examine it but in the past I have seen many a pan of break-in oil shimmer and swirl in the sunlight from the slurry of fine metal particles suspended in the oil. Not something I want circulating and polishing my engine parts for 7500 miles and causing premature wear.

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